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

Input: Consider Input: Sentence: 'one woman is arranging the other woman's hair'. Find frequency of the letter 'o'

Output: 4


Input: Consider Input: Sentence: 'a small dog sits in the rear window of a car'. Find frequency of the letter 'm'

Output: 1


Input: Consider Input: Sentence: 'grey and white cat sitting on top of a wooden chair'. Find frequency of the letter 'h'


Output: 2