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

Q: Sentence: 'a white bathroom sink sitting next to a toilet'. Find frequency of the letter 'i'

A: 5
****
Q: Sentence: 'a few giraffes standing in a field looking around'. Find frequency of the letter 'e'

A: 3
****
Q: Sentence: 'a large group of people at a mountain ski resort'. Find frequency of the letter 'o'

A:
5
****