Possibly a Cabbage Posted:

I’m kind of sick of checking Hall of Faded fame several times a day, hoping to catch it at 11 or 10 threads. Does anybody know how often number of threads resets, and about what times it resets? I would guess the counter for the first period starts “after rollover”, so I’d just need to ask somebody who’s awake then and know the frequency of thread count refreshes.

Every thirty minutes it resets.