on page https://fr.wiktionary.org/wiki/Spécial:UnconnectedPages?limit=5000&namespace=14 there are currenty thousands of pages
C:\pwb>pwb.py newitem -lang:fr -family:wiktionary -unconnectedpages -namespace:14 -touch -pageage:7 Page age is set to 7 days so only pages created before 2017-08-07T05:22:07Z will be considered. Last edit is set to 7 days so only pages last edited before 2017-08-07T05:22:07Z will be considered. Retrieving 18 pages from wiktionary:fr.
But there are 22 unconnected pages.
And thousand of connected needing purge, the newest of them have timestamp of creation
6 août 2014 à 09:37 (2014-08-06)
I tested it for longer time and the border between pages taken by pagegenerator and ignored pages was somewhere between 2104-08-06 and 2014-08-22, so I suppose 3 years