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: 'men standing in the grass with a frisbee'. Find frequency of the letter 'a'

Answer: 3


Question: Sentence: 'the counter of a doctor's office, including a laptop, cotton swabs, and tongue depressors'. Find frequency of the letter 'g'

Answer: 2


Question: Sentence: 'a close up of a pizza on a pan'. Find frequency of the letter 'i'

Answer:
1