TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a tv in a glass mirror in the bathroom'. Find frequency of the letter 'h'

SOLUTION: 2

PROBLEM: Sentence: 'a small wrinkley dog wearing a bow tie'. Find frequency of the letter 'e'

SOLUTION: 3

PROBLEM: Sentence: 'large shelf full of various fruits and vegetables'. Find frequency of the letter 'a'

SOLUTION:
4