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

Input: Consider Input: Sentence: 'young girl playing with refrigerator magnet while kneeling on floor'. Find frequency of the letter 'n'

Output: 6


Input: Consider Input: Sentence: 'a dog has found a rather large stick for playing fetch'. Find frequency of the letter 't'

Output: 3


Input: Consider Input: Sentence: 'a wooden bench sitting next to a bunch of flowers'. Find frequency of the letter 'c'


Output: 2