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

Input: Consider Input: Sentence: 'the receipts from a meal at a restaurant are for  a sandwich, chili, and apple'. Find frequency of the letter 'u'

Output: 1


Input: Consider Input: Sentence: 'a golden haired dog looking out of an open window'. Find frequency of the letter 'd'

Output: 4


Input: Consider Input: Sentence: 'a giraffe walkinf during the day near a wood fence'. Find frequency of the letter 'e'


Output: 5