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

Input: Consider Input: Sentence: 'a man walking a large elephant down a dirt road'. Find frequency of the letter 'g'

Output: 2


Input: Consider Input: Sentence: 'a knife a cutting board some bananas and a toaster'. Find frequency of the letter 'i'

Output: 2


Input: Consider Input: Sentence: 'a boy sitting in the sand next to the shore of an ocean with some type of boat just off shore'. Find frequency of the letter 'e'


Output: 8