TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'guy leans on truck's hood while taking pics next to parked motorcycles'. Find frequency of the letter 's'

SOLUTION: 4

PROBLEM: Sentence: 'a toilet filled with a brown liner and dirty water'. Find frequency of the letter 't'

SOLUTION: 5

PROBLEM: Sentence: 'a person holding a napkin and eating a hotdog'. Find frequency of the letter 'd'

SOLUTION:
3