http://www.cdlib.org/ has been crawled 638 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
1
2
3
4
5

January 6, 2011

1 snapshot

6
7
8
9
10
11
12

January 13, 2011

1 snapshot

13
14
15

January 16, 2011

1 snapshot

16
17
18
19
20
21
22
23
24
25
26

January 27, 2011

2 snapshots

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

February 23, 2011

2 snapshots

23

February 24, 2011

1 snapshot

24
25
26
27

February 28, 2011

1 snapshot

28
Mar
1
2

March 3, 2011

1 snapshot

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
Apr

April 1, 2011

1 snapshot

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

April 19, 2011

1 snapshot

19
20
21
22
23
24
25

April 26, 2011

1 snapshot

26
27
28
29

April 30, 2011

1 snapshot

30
May
1
2
3
4

May 5, 2011

1 snapshot

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

May 20, 2011

2 snapshots

20
21
22
23
24
25
26
27

May 28, 2011

1 snapshot

28
29
30
31
Jun
1

June 2, 2011

1 snapshot

2
3

June 4, 2011

1 snapshot

4
5
6
7
8
9
10
11
12

June 13, 2011

1 snapshot

13

June 14, 2011

1 snapshot

14
15
16
17
18
19
20

June 21, 2011

1 snapshot

21
22
23
24
25

June 26, 2011

2 snapshots

26
27
28
29

June 30, 2011

1 snapshot

30
Jul
1
2
3
4
5
6
7

July 8, 2011

1 snapshot

8
9
10
11
12
13
14

July 15, 2011

1 snapshot

15
16

July 17, 2011

1 snapshot

17

July 18, 2011

1 snapshot

18
19
20
21
22
23
24

July 25, 2011

1 snapshot

25
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
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
30
31

Note

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