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

[EX Q]: Sentence: 'a view from a bathroom shows an open door'. Find frequency of the letter 'o'
[EX A]: 7

[EX Q]: Sentence: 'two persons standing outside a moving sub train'. Find frequency of the letter 'a'
[EX A]: 3

[EX Q]: Sentence: 'a cluttered living room with stuff on the floor'. Find frequency of the letter 'o'
[EX A]:
5