I have recently had my first child, not an easy start for LO and I’ve had some health issues since as well. In-laws know what’s been going on.
DH and I visited his grandparents during the week, I arrived an hour or so before he did (he was working) and great granny made a few comments about not seeing LO enough. MIL has made similar comments and that she should see LO every Thursday since she’s off.
MIL lives next door to her parents, has done for decades, and they have always seen each other pretty much every day which I think has caused an expectation that I would visit them a few times a week.
YABU - of course you should visit a few times a week.
YANBU - once a week or less is fine.