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

[EX Q]: Sentence: 'man in a radio studio wearing a suit in front of a microphone'. Find frequency of the letter 't'
[EX A]: 3

[EX Q]: Sentence: 'oranges are sitting in a bowl on a table'. Find frequency of the letter 'a'
[EX A]: 5

[EX Q]: Sentence: 'boys playing soccer in a field surrounded by a fence'. Find frequency of the letter 'n'
[EX A]:
4