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

Input: Consider Input: Sentence: 'a variety of a different type of vegetables'. Find frequency of the letter 't'

Output: 4


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


Input: Consider Input: Sentence: 'black cat sitting on edge of sink next to granite wall'. Find frequency of the letter 'e'


Output: 4