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

[Q]: Sentence: 'a man standing in front of a statue near a metal pole'. Find frequency of the letter 'f'
[A]: 2


[Q]: Sentence: 'a herd of horses standing next to each other on a field'. Find frequency of the letter 'r'
[A]: 3


[Q]: Sentence: 'a women's soccer game going on with spectators'. Find frequency of the letter 'a'
[A]:
3