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

[Q]: Sentence: 'a car accident has slowed traffic as a clean up crew works'. Find frequency of the letter 'f'
[A]: 2


[Q]: Sentence: 'people waiting on a train platform in a wooded area'. Find frequency of the letter 'p'
[A]: 3


[Q]: Sentence: 'photograph of a girl posing with a skateboard'. Find frequency of the letter 'h'
[A]:
3