In this task, you need to count the number of times the given letter appears in the given sentence.
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Question: Sentence: 'a line of people on motorcycles on the road'. Find frequency of the letter 'e'

Answer: 5


Question: Sentence: 'a sheep in a field in front of other sheep'. Find frequency of the letter 'f'

Answer: 3


Question: Sentence: 'a man rared back at a tennis ball with a racquet'. Find frequency of the letter 'c'

Answer:
2