TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a herd of giraffes in tall african grass'. Find frequency of the letter 'a'

SOLUTION: 6

PROBLEM: Sentence: 'a snow filled mountain with a guy with ski's'. Find frequency of the letter 'f'

SOLUTION: 1

PROBLEM: Sentence: 'horse viewed out from a bar window in a fenced in enclosure'. Find frequency of the letter 's'

SOLUTION:
2

