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: 'a giraffe shares a habitat with a zebra, an ostrich, and an okapi'. Find frequency of the letter 'e'
answer:
3

question:
Sentence: 'an old photo shows people standing in the water with planes in the sky'. Find frequency of the letter 'e'
answer:
6