instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a family out snow skiing on a blustery day'. Find frequency of the letter 'i'
answer:
3


question:
Sentence: 'a scene at night; a plane alone on a runway with lit-up city buildings on the horizon'. Find frequency of the letter 'w'
answer:
2


question:
Sentence: 'a person riding a motorcycle down the street'. Find frequency of the letter 'p'
answer:

1