TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'two zebras feed on a plant through some wire mesh'. Find frequency of the letter 'o'

SOLUTION: 4

PROBLEM: Sentence: 'a river with a long dragon boat in it and rowers on the boat in sets of two, along with two other people'. Find frequency of the letter 'h'

SOLUTION: 4

PROBLEM: Sentence: 'a person jumping a dirt bike in the air'. Find frequency of the letter 'i'

SOLUTION:
5