http://www.whitehouse.gov/president/ has been crawled 1,685 times going all the way back to January 23, 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 16, 2013

2 snapshots

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January 20, 2013

1 snapshot

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January 21, 2013

1 snapshot

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January 29, 2013

1 snapshot

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January 30, 2013

1 snapshot

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February 21, 2013

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February 23, 2013

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February 25, 2013

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February 26, 2013

1 snapshot

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February 27, 2013

1 snapshot

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March 19, 2013

1 snapshot

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1 snapshot

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March 23, 2013

1 snapshot

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March 25, 2013

1 snapshot

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March 26, 2013

1 snapshot

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March 31, 2013

1 snapshot

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April 5, 2013

1 snapshot

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1 snapshot

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April 7, 2013

1 snapshot

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April 8, 2013

1 snapshot

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April 9, 2013

1 snapshot

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April 10, 2013

1 snapshot

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April 11, 2013

1 snapshot

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April 12, 2013

1 snapshot

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April 13, 2013

3 snapshots

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April 14, 2013

1 snapshot

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April 15, 2013

1 snapshot

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1 snapshot

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April 19, 2013

2 snapshots

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April 23, 2013

1 snapshot

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April 24, 2013

1 snapshot

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April 25, 2013

1 snapshot

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April 28, 2013

1 snapshot

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1 snapshot

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May 10, 2013

1 snapshot

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1 snapshot

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2 snapshots

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Oct
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Dec
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Note

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