http://directory.nih.gov/ has been crawled 379 times going all the way back to December 6, 1998.

A crawl can be a duplicate of the last one. It happens about 25% of the time across 420,000,000 websites. FAQ
Jan
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January 5, 2007

1 snapshot

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January 18, 2007

1 snapshot

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January 20, 2007

1 snapshot

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January 21, 2007

1 snapshot

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January 23, 2007

1 snapshot

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January 24, 2007

1 snapshot

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January 25, 2007

1 snapshot

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January 27, 2007

1 snapshot

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January 28, 2007

1 snapshot

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Feb
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February 3, 2007

1 snapshot

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February 6, 2007

1 snapshot

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February 18, 2007

1 snapshot

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February 19, 2007

1 snapshot

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February 20, 2007

1 snapshot

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February 21, 2007

1 snapshot

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February 23, 2007

1 snapshot

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February 25, 2007

1 snapshot

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February 27, 2007

1 snapshot

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February 28, 2007

1 snapshot

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Mar

March 1, 2007

1 snapshot

1
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March 3, 2007

1 snapshot

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March 4, 2007

1 snapshot

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March 6, 2007

1 snapshot

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March 8, 2007

1 snapshot

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March 9, 2007

1 snapshot

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March 11, 2007

1 snapshot

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March 18, 2007

1 snapshot

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March 20, 2007

1 snapshot

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March 21, 2007

1 snapshot

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March 22, 2007

1 snapshot

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March 25, 2007

1 snapshot

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March 27, 2007

1 snapshot

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March 29, 2007

1 snapshot

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Apr
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April 5, 2007

1 snapshot

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April 24, 2007

1 snapshot

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May
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May 3, 2007

1 snapshot

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May 4, 2007

1 snapshot

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May 5, 2007

1 snapshot

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May 6, 2007

1 snapshot

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May 9, 2007

1 snapshot

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May 15, 2007

1 snapshot

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May 16, 2007

1 snapshot

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May 18, 2007

1 snapshot

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May 19, 2007

1 snapshot

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May 22, 2007

1 snapshot

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May 23, 2007

1 snapshot

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May 24, 2007

1 snapshot

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May 25, 2007

1 snapshot

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May 26, 2007

1 snapshot

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May 27, 2007

1 snapshot

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May 29, 2007

1 snapshot

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May 30, 2007

1 snapshot

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Jun
1

June 2, 2007

1 snapshot

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June 3, 2007

1 snapshot

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June 5, 2007

1 snapshot

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June 6, 2007

1 snapshot

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June 7, 2007

1 snapshot

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Jul
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Aug
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Sep
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Oct
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Nov
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Dec
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Note

This calendar view maps the number of times http://directory.nih.gov/ was crawled by the Wayback Machine, not how many times the site was actually updated. More info in the FAQ.