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 couple of girls are hanging out at a restaurant'. Find frequency of the letter 'l'

Answer: 2

Question: Sentence: 'a bunch of people are standing out in a field a red one has their arms out as a white ball is in the air'. Find frequency of the letter 'e'

Answer: 9

Question: Sentence: 'a person far in the background flies a kite down right above some people sitting on a blanket on a beach'. Find frequency of the letter 'l'

Answer:
3