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

Input: Consider Input: Sentence: 'a parking meter painted green with a sign that describes it as not a parking meter'. Find frequency of the letter 's'

Output: 4


Input: Consider Input: Sentence: 'a woman with short, brown hair is looking into a circular mirror and holding a camera up to her cheek'. Find frequency of the letter 'e'

Output: 4


Input: Consider Input: Sentence: 'large reddish bananas next to apple slices on a cutting board'. Find frequency of the letter 'd'


Output: 3