>>It's still probably more than in an NFL game.
Likely you are correct as I don't really follow the NFL. Hockey and college hoops are my only 2 sports that are played here in the US.
Definately more but American football is a very different game than soccer, hockey or basketball which are continuous flow games. The play is over when the ball/ball carrier is down. The other games the play is only over when the ball/puck goes out of bounds. Comparing apples and watermellons.