TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a room with a big screen television and a couch'. Find frequency of the letter 'h'

SOLUTION: 2

PROBLEM: Sentence: 'a man riding a skateboard up the side of a ramp'. Find frequency of the letter 'u'

SOLUTION: 1

PROBLEM: Sentence: 'a surfer wipes out on a huge wave'. Find frequency of the letter 'a'

SOLUTION:
3