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

Example Input: Sentence: 'a plastic plastic plate topped with three different type of food'. Find frequency of the letter 'l'
Example Output: 3

Example Input: Sentence: 'an area that has surrounded by a metal fence'. Find frequency of the letter 'o'
Example Output: 1

Example Input: Sentence: 'two giraffes mating in the middle of a park reserve'. Find frequency of the letter 'm'
Example Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
2

