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

Input: Consider Input: Sentence: 'a bowl of granola with raspberries and honey on top with a spoon'. Find frequency of the letter 'w'

Output: 3


Input: Consider Input: Sentence: 'a lady mixes some things in a blender as people look on'. Find frequency of the letter 'i'

Output: 3


Input: Consider Input: Sentence: 'a bunch of signs about driving down into a tunnel'. Find frequency of the letter 't'


Output: 3