TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a girl laying on a bed posing for a picture'. Find frequency of the letter 'i'

SOLUTION: 4

PROBLEM: Sentence: 'a little boy standing near a couch and a table'. Find frequency of the letter 'i'

SOLUTION: 2

PROBLEM: Sentence: 'a construction sign is displayed on a street'. Find frequency of the letter 'i'

SOLUTION:
4