TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'two people in a snowy place near a wooden fence'. Find frequency of the letter 'n'

SOLUTION: 5

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

SOLUTION: 1

PROBLEM: Sentence: 'a group of shoes hangs above a door frame'. Find frequency of the letter 'u'

SOLUTION:
1