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 woman standing in front of a bathroom sink in front of a mirror'. Find frequency of the letter 'o'

Answer: 8


Question: Sentence: 'a toasted sub sandwich is next to a salad'. Find frequency of the letter 'a'

Answer: 6


Question: Sentence: 'a large bus parked on the side of a street in front of a building '. Find frequency of the letter 'e'

Answer:
6