instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'the little girl is flying her kite in the field'. Find frequency of the letter 'i'
answer:
7


question:
Sentence: 'the bathroom is in need of remodel'. Find frequency of the letter 'e'
answer:
5


question:
Sentence: 'a small child with a helmet on holding a tennis racket'. Find frequency of the letter 't'
answer:

4