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: 'pizza with different vegetables sitting on top of a wooden slab'. Find frequency of the letter 'o'

Answer: 5


Question: Sentence: 'a herd of horses standing next to each other on a field'. Find frequency of the letter 'r'

Answer: 3


Question: Sentence: 'a small dog is eating from his food bowl'. Find frequency of the letter 'n'

Answer:
1