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 pizza is in a box on a table outside'. Find frequency of the letter 'u'

Answer: 1


Question: Sentence: 'some cubbies with towels in a blue bathroom'. Find frequency of the letter 'l'

Answer: 2


Question: Sentence: 'a mama elephant with two babies standing in a field'. Find frequency of the letter 'a'

Answer:
7