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

[Q]: Sentence: 'a metallic stove top oven inside of a wooden kitchen'. Find frequency of the letter 'v'
[A]: 2


[Q]: Sentence: 'a police officer who is riding on a horse'. Find frequency of the letter 'p'
[A]: 1


[Q]: Sentence: '2 giraffes walking in the grass behind a fence'. Find frequency of the letter 'f'
[A]:
3