instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'three young people goofing around; one of the guys has a football, the girl has a teddy bear'. Find frequency of the letter 'd'
answer:
3


question:
Sentence: 'man in red shirt with black suitcase standing outside of building'. Find frequency of the letter 'i'
answer:
8


question:
Sentence: 'the old cow has a precarious position on a high hill'. Find frequency of the letter 'h'
answer:

5