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 baseball player dropping his bat and starting to run'. Find frequency of the letter 'o'

Answer: 2


Question: Sentence: 'pizza with different vegetables sitting on top of a wooden slab'. Find frequency of the letter 'o'

Answer: 5


Question: Sentence: 'a woman sits under a tree in front of a building'. Find frequency of the letter 's'

Answer:
2