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 young elephant is touching a bigger elephant with its trunk'. Find frequency of the letter 'i'

Answer: 5

Question: Sentence: 'an image of a cautionary construction sign'. Find frequency of the letter 'a'

Answer: 5

Question: Sentence: 'a girl surfing along a wave in the ocean'. Find frequency of the letter 'o'

Answer:
2