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 stop sign next to houses with christmas lights'. Find frequency of the letter 's'

Answer: 7


Question: Sentence: 'a number of small boats on a beach near an umbrella'. Find frequency of the letter 's'

Answer: 2


Question: Sentence: 'an old stove and trash bags sit on the curb'. Find frequency of the letter 'l'

Answer:
1