http://www.darpa.mil/ has been crawled 841 times going all the way back to December 2, 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 10, 2011

1 snapshot

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January 12, 2011

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January 13, 2011

2 snapshots

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January 16, 2011

1 snapshot

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January 28, 2011

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January 29, 2011

1 snapshot

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January 30, 2011

1 snapshot

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Feb
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February 2, 2011

2 snapshots

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February 7, 2011

1 snapshot

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February 8, 2011

1 snapshot

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February 9, 2011

1 snapshot

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February 11, 2011

1 snapshot

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February 19, 2011

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February 25, 2011

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March 9, 2011

1 snapshot

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March 16, 2011

1 snapshot

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Apr
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April 10, 2011

1 snapshot

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April 17, 2011

1 snapshot

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April 19, 2011

1 snapshot

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April 30, 2011

1 snapshot

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May
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May 10, 2011

1 snapshot

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May 14, 2011

1 snapshot

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Jun
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June 7, 2011

1 snapshot

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June 9, 2011

1 snapshot

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Jul
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July 8, 2011

1 snapshot

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July 10, 2011

1 snapshot

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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://www.darpa.mil/ was crawled by the Wayback Machine, not how many times the site was actually updated. More info in the FAQ.