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

Input: Consider Input: Sentence: 'a snowboarder making a jump of a snowy ledge'. Find frequency of the letter 'o'

Output: 4


Input: Consider Input: Sentence: 'the bathroom is in need of remodel'. Find frequency of the letter 'e'

Output: 5


Input: Consider Input: Sentence: 'a group of three women working on something at a kitchen'. Find frequency of the letter 'm'


Output: 2