http://www.lib.uiowa.edu/hardin/md/oto.html has been crawled 423 times going all the way back to May 26, 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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Feb
1
2
3
4
5
6
7
8
9
10
11
12

February 13, 2010

1 snapshot

13
14
15

February 16, 2010

1 snapshot

16
17
18
19
20
21
22
23
24
25
26
27
28
Mar
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

March 27, 2010

1 snapshot

27
28

March 29, 2010

1 snapshot

29
30
31
Apr
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
May

May 1, 2010

1 snapshot

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

May 20, 2010

1 snapshot

20
21

May 22, 2010

1 snapshot

22
23
24
25
26
27
28

May 29, 2010

1 snapshot

29
30
31
Jun

June 1, 2010

1 snapshot

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

June 18, 2010

1 snapshot

18
19
20
21
22
23
24
25
26
27
28
29
30
Jul
1

July 2, 2010

1 snapshot

2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

July 26, 2010

1 snapshot

26
27
28
29
30
31
Aug
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

August 26, 2010

1 snapshot

26
27
28
29
30
31
Sep
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Oct
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Nov
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Dec
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

December 30, 2010

1 snapshot

30
31

Note

This calendar view maps the number of times http://www.lib.uiowa.edu/hardin/md/oto.html was crawled by the Wayback Machine, not how many times the site was actually updated. More info in the FAQ.