Genuine question and willing to be told "no, they don't normally do this".
Our window cleaner turns up whenever he wants - it could be once a month or once a week, we literally never know when to expect him. Which means we always have to keep a tenner handy in case he shows up. But actually, that's a secondary issue, I'm more bothered about the fact that when he does clean the windows, it's a quick squeegee of the glass only, which means quite often I have to go out and clean cobwebs and dirt off the frames (it's unpleasant to open windows and watch webs stretching and breaking, and wonder if the evicted spiders will relocate inside to set up home again!)
So - AIBU to think that a window cleaner should give the frames a wipe-down too? We just have bog-standard PVC double-glazing, nothing special.