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

Input: Consider Input: Sentence: 'people fishing and enlarge mountainlake with trees lining the shoreline'. Find frequency of the letter 't'

Output: 4


Input: Consider Input: Sentence: 'there is a woman pointing at something with her dog'. Find frequency of the letter 'i'

Output: 5


Input: Consider Input: Sentence: 'a somewhat dark image of a laptop sitting in the background of a bedroom'. Find frequency of the letter 'g'


Output: 3