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 chair and umbrella on a sandy beach'. Find frequency of the letter 's'

Answer: 1

Question: Sentence: 'a pizza pie sitting on a wooden table with tongs'. Find frequency of the letter 't'

Answer: 5

Question: Sentence: 'two street signs over a high way'. Find frequency of the letter 'i'

Answer:
2