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

[EX Q]: Sentence: 'a girl sits on a surfboard and smiles'. Find frequency of the letter 'i'
[EX A]: 3

[EX Q]: Sentence: 'a man is taking a picture of a man and woman'. Find frequency of the letter 'a'
[EX A]: 8

[EX Q]: Sentence: 'the woman holds a young girl's hand while looking at her phone'. Find frequency of the letter 'l'
[EX A]:
4