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

Input: Consider Input: Sentence: 'a boy swinging a bat while playing baseball'. Find frequency of the letter 'h'

Output: 1


Input: Consider Input: Sentence: 'a man riding his skateboard down low as he turns'. Find frequency of the letter 'g'

Output: 1


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


Output: 5