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

[EX Q]: Sentence: 'a little boy standing near a couch and a table'. Find frequency of the letter 'i'
[EX A]: 2

[EX Q]: Sentence: 'a photo of a toilet which is not clean'. Find frequency of the letter 'w'
[EX A]: 1

[EX Q]: Sentence: 'the city streets are busy this time of night'. Find frequency of the letter 'e'
[EX A]:
5