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

Q: Sentence: 'a man on a skateboard going down a ramp while people are watching'. Find frequency of the letter 'w'

A: 3
****
Q: Sentence: 'a young woman dressed in green and black operating a remote control'. Find frequency of the letter 'r'

A: 5
****
Q: Sentence: 'a man flying through the air while riding a snowboard'. Find frequency of the letter 'o'

A:
3
****