instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'small airplane in the process of taking off'. Find frequency of the letter 'e'
answer:
3


question:
Sentence: 'the child is waving a small flag as she stands near two women'. Find frequency of the letter 'g'
answer:
2


question:
Sentence: 'a man is sitting in a chair and watching a child fly a kite'. Find frequency of the letter 'y'
answer:

1