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

Input: Consider Input: Sentence: 'a man with headphones on is hunched over a sink while being recorded'. Find frequency of the letter 'd'

Output: 4


Input: Consider Input: Sentence: 'a tower with some bright lights and clocks on it'. Find frequency of the letter 'h'

Output: 3


Input: Consider Input: Sentence: 'assorted vegetables and greens on a table cloth'. Find frequency of the letter 'c'


Output: 1