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 white bowl filled with peeled orange slices'. Find frequency of the letter 's'

Answer: 2

Question: Sentence: 'a lady mixes some things in a blender as people look on'. Find frequency of the letter 'i'

Answer: 3

Question: Sentence: 'a passenger train pulling into the train station'. Find frequency of the letter 'n'

Answer:
6