In this task, you need to count the number of times the given letter appears in the given sentence.

Q: Sentence: 'a plastic container next to a toilet on a wooden box'. Find frequency of the letter 'i'

A: 3
****
Q: 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'

A: 9
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Q: Sentence: 'a kitchen with bags on the table, appliances on the counter, a sink and a garbage can'. Find frequency of the letter 'c'

A:
4
****