instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a small boy in a high chair eating a cupcake'. Find frequency of the letter 'i'
answer:
4


question:
Sentence: 'a social occasion of people are uncovered before the open day'. Find frequency of the letter 'c'
answer:
4


question:
Sentence: 'a baseball pitcher is readying his pitch in a practice area'. Find frequency of the letter 'i'
answer:

7