TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a street scene looking at the back of the stop sign'. Find frequency of the letter 't'

SOLUTION: 6

PROBLEM: Sentence: 'the counter of a doctor's office, including a laptop, cotton swabs, and tongue depressors'. Find frequency of the letter 'g'

SOLUTION: 2

PROBLEM: Sentence: 'group of young kids on snowboards with man in red snow suit in foreground'. Find frequency of the letter 'u'

SOLUTION:
4