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

Input: Consider Input: Sentence: 'a bedroom with a neatly made bed and a laptop'. Find frequency of the letter 'l'

Output: 2


Input: Consider Input: Sentence: 'different sets of luggage in a baggage claim area'. Find frequency of the letter 'r'

Output: 2


Input: Consider Input: Sentence: 'a dog sitting next to a tennis racquet'. Find frequency of the letter 'o'


Output: 2