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

Input: Consider Input: Sentence: 'the man is holding a plastic sled with snow in it next to a child'. Find frequency of the letter 'g'

Output: 1


Input: Consider Input: Sentence: 'a stuffed animal sitting on an empty bed'. Find frequency of the letter 'u'

Output: 1


Input: Consider Input: Sentence: 'a garden show with a fountain and hammock'. Find frequency of the letter 'n'


Output: 4