Both.
I do a load almost every day - put it in the washer in the evening, move it to the dryer in the morning, fold the clothes that were already in the dryer before I leave for work.
And then on Saturday I do several "catch-up" loads so that *everything* is clean at once.
I dunno - I have 3 kids, and one is away at college much of the time. Why is there so darned much laundry around here??