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

Input: Consider Input: Sentence: 'two giraffes, one standing and one laying down'. Find frequency of the letter 'g'

Output: 3


Input: Consider Input: Sentence: 'a white bowl filled with peeled orange slices'. Find frequency of the letter 's'

Output: 2


Input: Consider Input: Sentence: 'two people holding their skies in a snowy resort'. Find frequency of the letter 'n'


Output: 3