Simplify the following text for a Grade 7 native English-speaking person.
Original: Nicknamed the `` Chicoutimi Cucumber '' for his calm composure while in goal , VÃ zina allowed the fewest goals against in the league seven times in his career : four times in the NHA and three times in the NHL .
Simplified: VÃ zina allowed the fewest goals against in the league seven times in his career : four times in the NHA and three times in the NHL .