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: 'a wedding cake with pink roses on a silver plate'. Find frequency of the letter 'a'
[EX A]: 4

[EX Q]: Sentence: 'a fire hydrant with poles around it near a wall'. Find frequency of the letter 'r'
[EX A]:
4