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 giraffes standing next to some trees'. Find frequency of the letter 'f'

Answer: 2

Question: Sentence: 'a baseball player dropping his bat and starting to run'. Find frequency of the letter 'o'

Answer: 2

Question: Sentence: 'a dog that is standing next to a bike'. Find frequency of the letter 'h'

Answer:
1