TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a picture of a machine built next to a street'. Find frequency of the letter 'x'

SOLUTION: 1

PROBLEM: Sentence: 'eight donuts are cooked together in oil in a metal tray'. Find frequency of the letter 'h'

SOLUTION: 2

PROBLEM: Sentence: 'three young girls sitting next to each other eating bananas'. Find frequency of the letter 't'

SOLUTION:
7