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

Sentence: 'salad and vegetables with me on top of plate'. Find frequency of the letter 'o'
3

Sentence: 'a man on a skateboard going down a ramp while people are watching'. Find frequency of the letter 'w'
3

Sentence: 'many people are watching a woman play a tennis game'. Find frequency of the letter 'c'

1