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

[Q]: Sentence: 'four women around a man sitting in front of a cake'. Find frequency of the letter 'o'
[A]: 5


[Q]: Sentence: 'a man riding a white surfboard on a large wave'. Find frequency of the letter 'a'
[A]: 7


[Q]: Sentence: 'a close up of a street sign with a building in the background'. Find frequency of the letter 'i'
[A]:
5