TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a crowd of fans watch soccer players from stadium seating'. Find frequency of the letter 'f'

SOLUTION: 3

PROBLEM: Sentence: 'an image of a street sign with a corner restaurant'. Find frequency of the letter 'u'

SOLUTION: 1

PROBLEM: Sentence: 'a giraffe stretching its head over a log to eat weeds'. Find frequency of the letter 'e'

SOLUTION:
7