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

Sentence: 'hand holding a white calculator inside a store'. Find frequency of the letter 'o'
3

Sentence: 'a small boat travels on the water next to the shore'. Find frequency of the letter 'a'
5

Sentence: 'a person slicing into a dessert covered in fruit'. Find frequency of the letter 'i'

5