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

[Q]: Sentence: 'a piece of film shows two street signs crossing each other'. Find frequency of the letter 'f'
[A]: 2


[Q]: Sentence: 'the meal is served and ready to be eaten'. Find frequency of the letter 'e'
[A]: 8


[Q]: Sentence: 'a group of people holding umbrellas standing behind a sign for a umbrella drive'. Find frequency of the letter 'a'
[A]:
6