http://www.24hourdata.com/ has been crawled 45 times going all the way back to February 24, 2001.

A crawl can be a duplicate of the last one. It happens about 25% of the time across 420,000,000 websites. FAQ
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January 28, 2011

2 snapshots

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January 31, 2011

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February 2, 2011

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February 3, 2011

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February 5, 2011

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February 7, 2011

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February 8, 2011

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February 11, 2011

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February 25, 2011

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February 27, 2011

1 snapshot

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Apr
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April 11, 2011

1 snapshot

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May
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May 11, 2011

1 snapshot

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Jun
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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://www.24hourdata.com/ was crawled by the Wayback Machine, not how many times the site was actually updated. More info in the FAQ.