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

[Q]: Sentence: 'a bunch of people are standing out in a field a red one has their arms out as a white ball is in the air'. Find frequency of the letter 'e'
[A]: 9


[Q]: Sentence: 'two zebra stand near the wooden posts on a building'. Find frequency of the letter 't'
[A]: 4


[Q]: Sentence: 'a boy about to hit a tennis ball'. Find frequency of the letter 'n'
[A]:
2