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

Sentence: 'people plating cake in an office meeting room'. Find frequency of the letter 'g'
2

Sentence: 'a man hits a tennis ball with a racket on the court'. Find frequency of the letter 'c'
2

Sentence: 'a white trunk parked next to a stop sign'. Find frequency of the letter 't'

5