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 group of people walking down a rain soaked street with umbrellas'. Find frequency of the letter 'w'

Answer: 3


Question: Sentence: 'an audience watches as a bird spreads its wings'. Find frequency of the letter 'd'

Answer: 3


Question: Sentence: 'the picture is fuzzy and it is hard to see if the skateboarder will fall'. Find frequency of the letter 't'

Answer:
6