TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a couple of buses parked on the side of the street'. Find frequency of the letter 'b'

SOLUTION: 1

PROBLEM: Sentence: 'a teenager witting on a futon couch holding gaming controls in both hands'. Find frequency of the letter 'c'

SOLUTION: 3

PROBLEM: Sentence: 'a large military plane parked in the landing area'. Find frequency of the letter 'h'

SOLUTION:
1