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

Input: Consider Input: Sentence: 'a street at night with trees and streetlights on'. Find frequency of the letter 't'

Output: 9


Input: Consider Input: Sentence: 'a bunch of people are standing out in a field a red one has their arms out as a white ball is in the air'. Find frequency of the letter 'e'

Output: 9


Input: Consider Input: Sentence: 'a bunch of people that are flying some kites'. Find frequency of the letter 'k'


Output: 1