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 lady mixes some things in a blender as people look on'. Find frequency of the letter 'i'

Answer: 3


Question: Sentence: 'a man playing baseball on a television set'. Find frequency of the letter 'l'

Answer: 4


Question: Sentence: 'two horses standing near a fence in the snow'. Find frequency of the letter 'e'

Answer:
5