During the summer it is more, but during the winter we back off the baths, my middle on has eczema, and baths dry her skin out really bad. We have been know to go a week, we do wipe downs when needed. We have yet had to use any special creams and such on the eczema this year. During the summer it is probably every other day or so.
Also, when we just had one child, it was probably everynight, now with three (even though they take baths together), it is not possible. My girls are also in bed asleep by seven everynight, so honestly, we run out of time too.