Two a day? What on earth are they doing to require that much washing?
The two-year old runs around outdoors in kindergarten all day. More often than not, it is rainy and muddy.
The youngest still run through a couple of sets of babywear a day, down to a somewhat lackadaisical approach to her excretion of various bodily fluids.
We all swim weekly. Add to that the occasional nightly mishap by the child currently quitting diapers, and you're looking at lots and lots of laundry cycles.
Good thing water is free (It's not that we haven't got plenty of it to go around!) and power is cheap.