You're right, frequency matters. I also think it matters that he reacted defensively (at least that's how I read the essay), rather that just saying, "Okay, sure" and putting the glass in the dishwasher. It's a token response that doesn't really mean much, but it's a token that shows some consideration.

I think that's why a workaround solution like putting the glass on a counter out-of-sight would also be helpful. It's not that the workaround necessarily improves anything from his wife's perspective (the glass still needs to be cleaned) but it shows some effort.