instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'four men standing around two pizzas in a conference room'. Find frequency of the letter 't'
answer:
2


question:
Sentence: 'a green bus driving in a street filled with heavy traffic'. Find frequency of the letter 'v'
answer:
2


question:
Sentence: 'a bicycle is parked near a body of water'. Find frequency of the letter 'a'
answer:

5