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

Input: Consider Input: Sentence: 'a little child looking up to a camera holding a cell phone'. Find frequency of the letter 'g'

Output: 2


Input: Consider Input: Sentence: 'a man playing baseball on a television set'. Find frequency of the letter 'l'

Output: 4


Input: Consider Input: Sentence: 'a laptop in the distance is sitting next to the sink with bowls'. Find frequency of the letter 'n'


Output: 5