instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a little boy sitting on a bed in a bedroom'. Find frequency of the letter 'e'
answer:
3


question:
Sentence: 'a bunch of green bananas is hanging on a tree'. Find frequency of the letter 'n'
answer:
7


question:
Sentence: 'a small bathroom with colorfully painted stone walls'. Find frequency of the letter 'f'
answer:

1