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

[EX Q]: Sentence: 'a traffic signal by a wire filled with some birds'. Find frequency of the letter 'e'
[EX A]: 3

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

[EX Q]: Sentence: 'one woman is arranging the other woman's hair'. Find frequency of the letter 'o'
[EX A]:
4