Last year's World Championship match between Anand and Carlsen had a primary time control of 40 moves in two hours. The secondary time control was 20 moves in 1 hour, followed by 15 minutes for the rest of the game, with a 30 second increment after move #61.
At most, 12 games might have been played.
At the recent U.S. Chess Championships help in St. Louis, the primary time control was 40 moves in 90 minutes followed by 30 minutes for the rest of the game. For this tournament there was a 30 second increment beginning with move #1.
The men's tournament was 11 rounds and the women's tournament was 9 rounds.
When speaking of professionals, how long are officially rated chess matches? Thanks.