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

Input: Consider Input: Sentence: 'a closeup view of a bathroom sink, that is very modern'. Find frequency of the letter 'e'

Output: 4


Input: Consider Input: Sentence: 'one woman holding a video game controller and standing next to another woman'. Find frequency of the letter 't'

Output: 5


Input: Consider Input: Sentence: 'a pizza that is sitting on a platter on a table'. Find frequency of the letter 't'


Output: 7