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

Input: Consider Input: Sentence: 'city two way street with cars lined up on both sides'. Find frequency of the letter 'h'

Output: 2


Input: Consider Input: Sentence: 'a person is holding a chocolate doughnut with rainbow sprinkles'. Find frequency of the letter 's'

Output: 4


Input: Consider Input: Sentence: 'a close up of a giraffe in a field with bushes'. Find frequency of the letter 's'


Output: 3