It largely depends on the adventure, DM & Player style, and level. Some adventures are very time sensitive, and might not allow even a single short rest. Some DMs make short rests have an opportunity cost (or players might perceive them as such), while others may make them easy and common. Level is a big factor, as are certain classes (battlemaster, monk, warlock), as they determine how beneficial each short rest might be (you only have so many HD). Other than that, you could take 16 short rest in a day (but not get anything done).
My group generally performs about 1 short rest per long rest, mostly because of the potential opportunity cost. Recently Warlocks have become more common among our players, so I expect as we get higher level we'll probably take more.