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: 'there is a stop sign that has a reflection in a puddle'. Find frequency of the letter 'e'

Answer: 5


Question: Sentence: 'two men sitting quietly on a park bench'. Find frequency of the letter 'a'

Answer: 2


Question: Sentence: 'a small bathroom that has a toilet in the floor'. Find frequency of the letter 'a'

Answer:
6