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

[Q]: Sentence: 'bananas are being dried in a tropical setting'. Find frequency of the letter 'i'
[A]: 5

[Q]: Sentence: 'a young man with glasses on is taking a big bite'. Find frequency of the letter 's'
[A]: 4

[Q]: Sentence: 'a view of a person's legs sitting on a bench alone'. Find frequency of the letter 'o'
[A]:
4