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

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

Output: 3


Input: Consider Input: Sentence: 'a man swinging a bat while playing baseball'. Find frequency of the letter 'm'

Output: 1


Input: Consider Input: Sentence: 'an old vehicle for transporting people being displayed'. Find frequency of the letter 'l'


Output: 4