http://toxnet.nlm.nih.gov/ has been crawled 640 times going all the way back to December 6, 1998.
A crawl can be a duplicate of the last one. It happens about 25% of the time across 420,000,000 websites. FAQ
|
1
| ||||||
|
1
| ||||||
|
1
| ||||||
|
1
|
1
| |||||
|
1
| ||||||
|
1
|
1
| |||||
|
1
| ||||||
|
1
|
1
|
1
| ||||
|
1
| ||||||
|
1
|
1
| |||||
|
1
| ||||||
|
1
| ||||||
|
1
| ||||||
|
1
|
1
| |||||
|
2
| ||||||
|
2
| ||||||
|
1
|
1
| |||||
|
1
| ||||||
|
1
| ||||||
|
4
|
1
| |||||
| Jan | ||||||
|---|---|---|---|---|---|---|
|
1
| ||||||
|
2
|
3
|
4
|
5
|
7
|
8
| |
|
9
|
10
|
11
|
12
|
14
|
15
| |
|
16
|
17
|
18
|
19
|
21
|
22
| |
|
23
|
24
|
25
|
28
|
29
| ||
|
30
|
31
| |||||
| Feb | ||||||
|---|---|---|---|---|---|---|
|
1
|
2
|
4
|
5
| |||
|
6
|
7
|
8
|
11
|
12
| ||
|
13
|
14
|
15
|
16
|
18
|
19
| |
|
20
|
21
|
23
|
25
| |||
|
27
|
28
| |||||
| Mar | ||||||
|---|---|---|---|---|---|---|
|
1
|
2
|
4
|
5
| |||
|
6
|
8
|
9
|
11
|
12
| ||
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
|
27
|
28
|
29
|
30
|
31
| ||
| Apr | ||||||
|---|---|---|---|---|---|---|
|
2
| ||||||
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
|
10
|
11
|
12
|
13
|
15
|
16
| |
|
17
|
18
|
19
|
20
|
21
|
22
| |
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
| May | ||||||
|---|---|---|---|---|---|---|
|
2
|
4
|
5
|
6
|
7
| ||
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
|
15
|
16
|
17
|
18
|
19
|
20
| |
|
22
|
23
|
24
|
25
|
26
|
28
| |
|
29
|
30
|
31
| ||||
| Jun | ||||||
|---|---|---|---|---|---|---|
|
2
|
4
| |||||
|
5
|
6
|
8
|
9
|
10
|
11
| |
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
|
26
|
28
|
29
|
30
| |||
| Jul | ||||||
|---|---|---|---|---|---|---|
|
1
|
2
| |||||
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
|
17
|
18
|
19
|
20
|
23
| ||
|
24
|
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://toxnet.nlm.nih.gov/ was crawled by the Wayback Machine, not how many times the site was actually updated. More info in the FAQ.