In bowling what is a complete game of ten frames called?
A game. Or in bowling slang, a line.
Usually a "string" refers to a number of consecutive strikes. There are 10 frames per game in ten pin bowling. If you strike in the 10th frame you get two "fill balls" as a bonus. These fill balls are sometimes referred to as the 11th and 12th frames, but this a misnomer. There areonly 10 frames in a game of ten pin bowling.