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

Q: Sentence: 'the receipts from a meal at a restaurant are for  a sandwich, chili, and apple'. Find frequency of the letter 'u'

A: 1
****
Q: Sentence: 'some food on plates next to each other on a table'. Find frequency of the letter 'e'

A: 6
****
Q: Sentence: 'a black bird sits on the roof of a brick house'. Find frequency of the letter 'k'

A:
2
****