I usually punt fortnightly: a newbie for an hour towards the beginning of the month; my Regular for longer than that towards the end of the month.
I'd never kept a formal budget before this year - just kept figures in my head, so to speak - but when there was a thread late last year about how much we spend, I thought I'd try to keep a proper record just for my own purposes.
So, excluding travel expenses and other sundries, I've only spent £100 so far; January's total spend will be higher than that, though.
I'm sure I remember reading someone posting on here 3 or 4 years ago that, because there's no Council Tax or Water Rates to pay in February or March, then the "punting budget" in those two months can be more generous.
In that case, I might be more active next month than I will be this month!