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

[Q]: Sentence: 'tow birds flying by a long necked crane'. Find frequency of the letter 'f'
[A]: 1


[Q]: Sentence: 'a double decker transit bus parks by a blue on the side of the street in front of a brick building in the city'. Find frequency of the letter 't'
[A]: 9


[Q]: Sentence: 'a person standing at a stand with many bananas'. Find frequency of the letter 'a'
[A]:
9