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

[Q]: Sentence: 'a woman with short, brown hair is looking into a circular mirror and holding a camera up to her cheek'. Find frequency of the letter 'e'
[A]: 4


[Q]: Sentence: 'cars parked outside if a retail store'. Find frequency of the letter 'd'
[A]: 2


[Q]: Sentence: 'a person sits on a floor next to a laptop'. Find frequency of the letter 'p'
[A]:
3