In this task, you need to count the number of times the given letter appears in the given sentence.
--------
Question: Sentence: 'a microwave oven with a yellow note on the door'. Find frequency of the letter 'w'

Answer: 3


Question: Sentence: 'a group of people standing around a table filled with assorted electronic devices'. Find frequency of the letter 'w'

Answer: 1


Question: Sentence: 'a dog running with a frisbee in its mouth'. Find frequency of the letter 'd'

Answer:
1