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 boy catching a frisbee while standing ins bunch of leaves'. Find frequency of the letter 'a'

A: 5
****
Q: Sentence: 'a tray with food, cup, spoon on a table'. Find frequency of the letter 'd'

A:
1
****