>>26346793Apart from laziness, mental breaks or enjoying their private life (more or less common) there's this clip of Noel answering a fan question about why they keep being busy in which she talks how long it takes to prepare sponsor deals and promotional work so they're basically busy for months or even a year in advance.
https://youtu.be/3kPwET0uwzQSome of them do idol training thing, though; as someone who followed real kpop idol groups years ago, I think it's usually overstated here how much time they take to practice or prepare events considering the pretty average results they have and how little they perform in comparison to real life idols. But that's just my opinion.