TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a group of people walking down a rain soaked street with umbrellas'. Find frequency of the letter 'w'

SOLUTION: 3

PROBLEM: Sentence: 'a surfer is in the middle of an ocean wave'. Find frequency of the letter 'i'

SOLUTION: 3

PROBLEM: Sentence: 'a man and woman cutting their wedding cake'. Find frequency of the letter 'h'

SOLUTION:
1