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

Q: Sentence: 'a toilet filled with a brown liner and dirty water'. Find frequency of the letter 't'

A: 5
****
Q: Sentence: 'a white bowl filled with peeled orange slices'. Find frequency of the letter 's'

A: 2
****
Q: Sentence: 'a microwave oven laying on top of a box outdoors'. Find frequency of the letter 'o'

A:
9
****