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

[Q]: Sentence: 'a group of men standing around a table cutting a cake'. Find frequency of the letter 'g'
[A]: 3


[Q]: Sentence: 'hand holding a white calculator inside a store'. Find frequency of the letter 'o'
[A]: 3


[Q]: Sentence: 'a lady that has a tennis racket in her hand'. Find frequency of the letter 't'
[A]:
4