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: 'two pepperoni pizzas and a cup on a counter'. Find frequency of the letter 'u'

Answer: 2


Question: Sentence: 'a man with glasses adjusting his tie in a mirror'. Find frequency of the letter 's'

Answer: 5


Question: Sentence: 'a person on a motorcycle on a city street'. Find frequency of the letter 'p'

Answer:
1