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

[Q]: Sentence: 'a large motorcycle that has a man dressed in old clothing next to it'. Find frequency of the letter 'a'
[A]: 6


[Q]: Sentence: 'two elephants facing each other touching trunks in an enclosure'. Find frequency of the letter 'f'
[A]: 1


[Q]: Sentence: 'motor vehicles on roadway in urban city setting'. Find frequency of the letter 'e'
[A]:
3