instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a burning wood stove has a tea pot sitting on top of it and is full of wood'. Find frequency of the letter 'a'
answer:
5


question:
Sentence: 'a girl sits on a surfboard and smiles'. Find frequency of the letter 'i'
answer:
3


question:
Sentence: 'a toilet bowl containing a pink rose stem'. Find frequency of the letter 'e'
answer:

3