TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a person does a trick on a ramp on a snowboard'. Find frequency of the letter 's'

SOLUTION: 3

PROBLEM: Sentence: 'a batter, catcher and umpire waiting for the pitch and a major league baseball game'. Find frequency of the letter 'c'

SOLUTION: 3

PROBLEM: Sentence: 'a house cat is taking a bite from a banana'. Find frequency of the letter 't'

SOLUTION:
3