A package can fill an eight frame medium with comb in three weeks. But sometimes they don't. :) So that's half of a deep (equivelant to five deep frames). But that's when they really start to build up because soon you have emerging brood to replace the bees that have been dying off, so the next five deep frames (or eight frame medium box) may go even quicker. This assumes of course either a good flow and/or feeding. But in the end the bees do what they want. Some build faster, some slower.