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: 'a bird on a tree is flapping its wings'. Find frequency of the letter 'o'

Answer: 1


Question: Sentence: 'the scale is sitting there so you can put the money in it to park there car'. Find frequency of the letter 'i'

Answer:
5