instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a group of giraffes walk together by a hill'. Find frequency of the letter 'b'
answer:
1


question:
Sentence: 'a man on stiltz is standing under a pink umbrella'. Find frequency of the letter 's'
answer:
3


question:
Sentence: 'a very large teddy bar in the display window of a store'. Find frequency of the letter 'f'
answer:

1