How often will villagers ask to move out?

[a sprout]

I know that villagers won't move out unless you tell them to. But they seem to ask less frequently than they did in New Leaf...does anyone know how often they'll ask to move out?

 

[Loriii]

It takes around two weeks (on average) before they ask to move. Maybe a week, if you're lucky. That's from my personal observation. It's harder to make villagers move now without the help of amiibo. So if you're planning to move a specific villager, it'll probably involve a lot of TTing.