TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a girl sits on a surfboard and smiles'. Find frequency of the letter 'i'

SOLUTION: 3

PROBLEM: Sentence: 'a player swings his bat at a baseball game'. Find frequency of the letter 'p'

SOLUTION: 1

PROBLEM: Sentence: 'the three plates are elevated above one another with desserts on them'. Find frequency of the letter 'h'

SOLUTION:
5