I did sponge baths until the cord stump fell off. About 3 a week.
I didn't do a "real" bath until about 2 weeks because it took that long for the stump to fall off.
This. You aren't supposed to give a full-on bath while the stump is still on. It needs to dry up and fall off. You can sponge bathe the diaper area for the first couple of weeks and that will keep baby plenty clean. After that, a couple baths a week should be fine, until baby gets more active. Newborn skin is so sensitive. With older babies and toddlers, a daily bath is often appropriate.