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

[Q]: Sentence: 'a white bowl filled with peeled orange slices'. Find frequency of the letter 's'
[A]: 2


[Q]: Sentence: 'a crowd of people skiing and enjoying the snow'. Find frequency of the letter 'o'
[A]: 5


[Q]: Sentence: 'a group of young men playing a game of frisbee'. Find frequency of the letter 'o'
[A]:
4