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

[Q]: Sentence: 'the child is waving a small flag as she stands near two women'. Find frequency of the letter 'g'
[A]: 2

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

[Q]: Sentence: 'four donkeys are carrying baskets by the water'. Find frequency of the letter 'e'
[A]:
5