In this task, you need to count the number of times the given letter appears in the given sentence.

[EX Q]: Sentence: 'a closet with a fan, luggage and various boxes'. Find frequency of the letter 'a'
[EX A]: 6

[EX Q]: Sentence: 'group of cars on the road with the sun setting behind it'. Find frequency of the letter 'd'
[EX A]: 2

[EX Q]: Sentence: 'a person riding a motorcycle on a closed course'. Find frequency of the letter 'e'
[EX A]:
4