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 group of cows that are standing in the grass'. Find frequency of the letter 'g'

Answer: 3

Question: Sentence: 'a long row of tables displaying lots of fruit'. Find frequency of the letter 'o'

Answer: 5

Question: Sentence: 'a broken stop sign leaning into the street'. Find frequency of the letter 'k'

Answer:
1