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

Input: Consider Input: Sentence: 'bananas are being dried in a tropical setting'. Find frequency of the letter 'i'

Output: 5


Input: Consider Input: Sentence: 'man is snow gear and skis skiing in the snow'. Find frequency of the letter 'i'

Output: 5


Input: Consider Input: Sentence: 'people standing on the sand near surfboards and the water'. Find frequency of the letter 't'


Output: 4