I do almost all my cleaning 10-15 min at a time. (Sometimes 5, but that rarely makes enough of a dent that I'm ready to stop. But it does give me a take a kid to the potty, get someone juice, bust up a fight break.)
Decluttering, I usually can't do quickly. I'm just not mentally prepared for it. Every now and again, yes. I would say 15-30 min is more doable.
The trouble I have is what takes me 15 min to pickup takes the kids 3 min to destroy.