Other contributors have said "How many times has copahue erupted?" is the same question as "How many eruptions has copahue volcano had?" If you believe that these are not asking the same thing and should be answered differently, click here
We don't know and probably never will know. There have been wild estimates of 20,000 people to as few as 2,000, but these are all guesses. The complete city of Pompeii has not been excavated fully....