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 couple of buses parked on the side of the street'. Find frequency of the letter 'b'

Answer: 1


Question: Sentence: 'three elephants walk up a dirt trail from the water'. Find frequency of the letter 'l'

Answer: 3


Question: Sentence: 'a giraffe is leaning over a fence with its tongue out'. Find frequency of the letter 'e'

Answer:
6