instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a man hits a tennis ball with a racket on the court'. Find frequency of the letter 'c'
answer:
2


question:
Sentence: 'city two way street with cars lined up on both sides'. Find frequency of the letter 'h'
answer:
2


question:
Sentence: 'a hand holding a donut with sprinkles on it'. Find frequency of the letter 'i'
answer:

4