instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a plastic container next to a toilet on a wooden box'. Find frequency of the letter 'i'
answer:
3


question:
Sentence: 'a blue fire hydrant painted on the bottom of it'. Find frequency of the letter 'h'
answer:
2


question:
Sentence: 'a group of cows in a fenced in field'. Find frequency of the letter 'd'
answer:

2