TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'bananas are being dried in a tropical setting'. Find frequency of the letter 'i'

SOLUTION: 5

PROBLEM: Sentence: 'a herd of horses standing next to each other on a field'. Find frequency of the letter 'r'

SOLUTION: 3

PROBLEM: Sentence: 'a group of people in grassy area flying kites'. Find frequency of the letter 'k'

SOLUTION:
1