instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a man in a sweatshirt is taking his own picture'. Find frequency of the letter 'u'
answer:
1


question:
Sentence: 'a snow filled mountain with a guy with ski's'. Find frequency of the letter 'f'
answer:
1


question:
Sentence: 'group of adults in kitchen area of home with wood flooring'. Find frequency of the letter 'e'
answer:

3