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

Input: Consider Input: Sentence: 'vanity sitting atop a base with two doors and a mirror overhead'. Find frequency of the letter 'n'

Output: 3


Input: Consider Input: Sentence: 'a little child looking up to a camera holding a cell phone'. Find frequency of the letter 'g'

Output: 2


Input: Consider Input: Sentence: 'two indian women in colorful garb standing barefoot with two indian men'. Find frequency of the letter 'd'


Output: 3