instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a metallic stove top oven inside of a wooden kitchen'. Find frequency of the letter 'v'
answer:
2


question:
Sentence: 'a couple of people that are on a baseball field'. Find frequency of the letter 'c'
answer:
1


question:
Sentence: 'a bicycle has been parked on a mattress on the floor'. Find frequency of the letter 'f'
answer:

1