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

Input: Consider Input: Sentence: 'a tower with some bright lights and clocks on it'. Find frequency of the letter 'h'

Output: 3


Input: Consider Input: Sentence: 'bathroom scene with a black cat going behind the door'. Find frequency of the letter 'e'

Output: 4


Input: Consider Input: Sentence: 'a breakfast of eggs, avocados and toast on a blue flowered plate'. Find frequency of the letter 'g'


Output: 2