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 gray elephant is in a grassy field'. Find frequency of the letter 'e'

Answer: 3


Question: Sentence: 'a woman in a messy kitchen with a child'. Find frequency of the letter 'a'

Answer: 4


Question: Sentence: 'a small figurine of a person riding a bike on a wooden desk'. Find frequency of the letter 'f'

Answer:
2