How often and for how long is it reasonable for grandparents to visit ?

Ki

I’m trying to figure out if I’m off base here getting annoyed with my in-laws visiting 2x per week (staying anywhere 30 min-4 hours) and the assumption they make that that’s “their schedule “. My MIL annoys the hell out of me.

But I don’t want this to be about me. I can suck it up and deal if I should. I want it to be about what’s best for my daughter.