TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a man in his car eating a donut'. Find frequency of the letter 'm'

SOLUTION: 1

PROBLEM: Sentence: 'a closeup view of a bathroom sink, that is very modern'. Find frequency of the letter 'e'

SOLUTION: 4

PROBLEM: Sentence: 'a snowboarder performs a trick on a box'. Find frequency of the letter 'n'

SOLUTION:
2