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

Q: Sentence: 'pedestrians pass by a stop sign, some holding surfboards'. Find frequency of the letter 'n'

A: 3
****
Q: Sentence: 'a young boy holding a piece of paper on top of a table'. Find frequency of the letter 'y'

A: 2
****
Q: Sentence: 'a picture of a piece of pizza in a box'. Find frequency of the letter 'p'

A:
3
****