TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a surfer is in the middle of an ocean wave'. Find frequency of the letter 'i'

SOLUTION: 3

PROBLEM: Sentence: 'some cubbies with towels in a blue bathroom'. Find frequency of the letter 'l'

SOLUTION: 2

PROBLEM: Sentence: 'sign explaining street and landscape improvements on a tree-lined street'. Find frequency of the letter 'd'

SOLUTION:
3