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

Sentence: 'a desk covered in notepads, a laptop and other devices'. Find frequency of the letter 'c'
2

Sentence: 'cooked fish and green broccoli share a single white plate'. Find frequency of the letter 'c'
3

Sentence: 'a sandwich with with sauce and balls in it wrapped in wax paper'. Find frequency of the letter 'p'

4