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 crowd of people standing in front of a green train'. Find frequency of the letter 'g'

Answer: 2


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 giraffe in a grassy field full of animals'. Find frequency of the letter 'y'

Answer:
1