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

Input: Consider Input: Sentence: 'a woman holds the reins of a saddled horse'. Find frequency of the letter 'm'

Output: 1


Input: Consider Input: Sentence: 'a glass bowl of raw broccoli, a ceramic bowl of raw green chili peppers, and steel bowl of raw daikon'. Find frequency of the letter 'a'

Output: 9


Input: Consider Input: Sentence: 'people in a fruit stand at a market'. Find frequency of the letter 'e'


Output: 3