instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a few giraffes standing in a field looking around'. Find frequency of the letter 'e'
answer:
3

question:
Sentence: 'small airplane in the process of taking off'. Find frequency of the letter 'e'
answer:
3

question:
Sentence: 'two very cute cats laying together near some grass'. Find frequency of the letter 'n'
answer:
2