I checked some random users from my foot fetish site
http://www.hercutefeet.com
and it seems this one is the longest:
03/19/2006 15:56:53
29092922 USD 19.95
First charge / Recurring (CC)
04/19/2006 04:06:50
29365865 USD 19.95
Recurred charge / Recurring (CC)
05/19/2006 04:42:31
29635318 USD 19.95
Recurred charge / Recurring (CC)
06/19/2006 04:04:19
29895174 USD 19.95
Recurred charge / Recurring (CC)
07/19/2006 03:27:04
30155749 USD 19.95
Recurred charge / Recurring (CC)
08/19/2006 03:11:20
30428210 USD 19.95
Recurred charge / Recurring (CC)
09/19/2006 04:25:50
30698295 USD 19.95
Recurred charge / Recurring (CC)
10/19/2006 04:16:08
30972859 USD 19.95
Recurred charge / Recurring (CC)
11/19/2006 04:03:04
31247728 USD 19.95
Recurred charge / Recurring (CC)
12/19/2006 21:09:58
31530043 USD 19.95
Recurred charge / Recurring (CC)
01/19/2007 03:33:01
31795752 USD 19.95
Recurred charge / Recurring (CC)
02/19/2007 03:43:50
32060217 USD 19.95
Recurred charge / Recurring (CC)
03/19/2007 03:30:29
32308533 USD 19.95
Recurred charge / Recurring (CC)
04/19/2007 03:25:53
32553441 USD 19.95
Recurred charge / Recurring (CC)
05/19/2007 03:22:31
32790476 USD 19.95
Recurred charge / Recurring (CC)
06/19/2007 03:35:10
33028517 USD 19.95
Recurred charge / Recurring (CC)
Some others were between 4 and 8 months in average, so I think that's pretty good