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

Input: Consider Input: Sentence: 'a bathroom with a sink, counter top, and mirror is shown'. Find frequency of the letter 'i'

Output: 4


Input: Consider Input: Sentence: 'a bunch of fruit sitting in a bowl, its overflowing'. Find frequency of the letter 't'

Output: 4


Input: Consider Input: Sentence: 'some people working in a kitchen with wooden cabinets'. Find frequency of the letter 'l'


Output: 1