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

Input: Consider Input: Sentence: 'a close up of a plate with a whole carrot'. Find frequency of the letter 'w'

Output: 2


Input: Consider Input: Sentence: 'a double decker bus with a lot of people on board'. Find frequency of the letter 'l'

Output: 3


Input: Consider Input: Sentence: 'a mixed bouquet of flowers in a glass vase set before a window'. Find frequency of the letter 'w'


Output: 3