instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a social occasion of people are uncovered before the open day'. Find frequency of the letter 'c'
answer:
4


question:
Sentence: 'wooden and black bench on the side of the road'. Find frequency of the letter 'a'
answer:
3


question:
Sentence: 'there is a small piece of bright blue cake left on a plate with a knife'. Find frequency of the letter 'h'
answer:

3