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

Q: Sentence: 'a woman in a messy kitchen with a child'. Find frequency of the letter 'a'

A: 4
****
Q: Sentence: 'apples, pears, and oranges are piled up for sale'. Find frequency of the letter 'a'

A: 6
****
Q: Sentence: 'a number of giraffes in a field near a tree'. Find frequency of the letter 'a'

A:
5
****