Through most of the year this year, it's been at least weekly and would start to look pretty rough if I pushed it to 8-9 days.
The last mow was after two weeks, and that was two weeks ago now. I'll look at it and see parts that I think could stand a trim, but other parts not at all. It also hasn't rained in several weeks.
As of now, we have rain in the forecast tomorrow. With that in mind, I'm planning on another mow toward the end of the week, and that MAY be the last of the season other than possibly one toward the end of the month to chop up the leaves.