TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'flower in a vase full of water sitting on a stand '. Find frequency of the letter 'l'

SOLUTION: 3

PROBLEM: Sentence: 'a young elephant is touching a bigger elephant with its trunk'. Find frequency of the letter 'i'

SOLUTION: 5

PROBLEM: Sentence: 'a group of people walk outside in the rain with umbrellas'. Find frequency of the letter 'a'

SOLUTION:
4