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

Input: Consider Input: Sentence: 'the child is waving a small flag as she stands near two women'. Find frequency of the letter 'g'

Output: 2


Input: Consider Input: Sentence: 'a young boy holding a piece of paper on top of a table'. Find frequency of the letter 'y'

Output: 2


Input: Consider Input: Sentence: 'a dilapidated bench in a park under a tree'. Find frequency of the letter 'p'


Output: 2