instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a tennis player after hitting a shot back to the other side of the court'. Find frequency of the letter 'n'
answer:
3


question:
Sentence: 'slices of orange are arranged on a plate'. Find frequency of the letter 's'
answer:
2


question:
Sentence: 'a grey motorcycle parked on a dirty lot next to a forest'. Find frequency of the letter 'e'
answer:

5