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: 'two people wearing snowboards sitting on a snowy slope'. Find frequency of the letter 's'

SOLUTION: 5

PROBLEM: Sentence: 'a couple of young boys riding on a brown and a black horse'. Find frequency of the letter 'w'

SOLUTION:
1