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: 'the street sign is next to a curved road'. Find frequency of the letter 's'

Answer: 3


Question: Sentence: 'two bigger elephants standing with a small elephant'. Find frequency of the letter 't'

Answer: 5


Question: Sentence: 'a women who is walking down the street with a piece of luggage'. Find frequency of the letter 'e'

Answer:
7