To update, having checked, yeah it’s a 2 week limit
Usage: “/timeout <username> [duration][time unit] [reason]” - Temporarily prevent a user from chatting. Duration (optional, default=10 minutes) must be a positive integer; time unit (optional, default=s) must be one of s, m, h, d, w; maximum duration is 2 weeks. Combinations like 1d2h are also allowed. Reason is optional and will be shown to the target user and other moderators. Use “untimeout” to remove a timeout
For changing the limit, suggestions can be made to the uservoice