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 glass bowl of raw broccoli, a ceramic bowl of raw green chili peppers, and steel bowl of raw daikon'. Find frequency of the letter 'a'

Answer: 9


Question: Sentence: 'a white paper plate with a slice of pizza on it'. Find frequency of the letter 'h'

Answer: 2


Question: Sentence: 'snowboarder resting on side of mountain admiring view'. Find frequency of the letter 'd'

Answer:
3