quite alot, can range btw 2-3 pcs a day.
but dont need to buy a lot of newborn clothes, they are too small to last.
good to get 3-6months clothings instead. Maybe get a dozen of it? Those hdb neighbourhood shops sells those. And they are cheaper. The material is also thinner so that it dries within a day.
consider to invest on 6-12 months ones. Can wear for the whole year.