I have been doing contact printing of 4x5 negatives for a whopping month or so... so take it with a grain of salt... but I do more burning than I do dodging. My light source (a 15 watt incandescent bulb in a reflector 3 feet above the work surface with the effective voltage cut to 40% by using a half-wave rectifier) gives me exposure times in the 20-40 second range. That gives me my base exposure and then lots of time with a card to burn in sections of the print if necessary.

But in general, I find that I am burning or dodging significantly less than I was when enlarging.