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: 'three people are gathered around sitting on a park bench'. Find frequency of the letter 'g'

Answer: 2


Question: Sentence: 'a train station with a train pulling into the platform'. Find frequency of the letter 'i'

Answer: 6


Question: Sentence: 'a young asian boy holding a teddy bear in a red sweater'. Find frequency of the letter 'y'

Answer:
3