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 metallic stove top oven inside of a wooden kitchen'. Find frequency of the letter 'v'

Answer: 2

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

Answer: 2

Question: Sentence: 'two men on a tennis court holding tennis rackets and competing'. Find frequency of the letter 'r'

Answer:
2