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

Input: Consider Input: Sentence: 'a plastic tray that has different foods inside of it'. Find frequency of the letter 't'

Output: 6


Input: Consider Input: Sentence: 'a person riding a camel in front of a truck'. Find frequency of the letter 't'

Output: 2


Input: Consider Input: Sentence: 'two men sitting quietly on a park bench'. Find frequency of the letter 'a'


Output: 2