Define a "combat."
Does that include a ranged PC taking down a lone guardsman? Is it only set piece battles? What about clearing a tower where the PCs get a couple rounds between each floor to recover? Is that all one combat, or several small ones? What instances where the party sprints under fire from one building to the next?
The reason I ask is because the players in my PotA game decided to strike Rivergard Keep hard and fast. They have been there for less than three minutes and haven't stopped moving and fighting the entire time. If I include each patrol who fell from a single attack it's close to ten combats. If I only count battles that lasted longer than the surprise round then it's only three combats.
Since most of my sessions focus more on the location the characters are investigating (usually without significant combat) rather than discrete encounters, it is difficult to answer the poll.