In this task, you need to count the number of times the given letter appears in the given sentence.
--------
Question: Sentence: 'a giraffe sticking it's tongue out near a window'. Find frequency of the letter 'a'

Answer: 4


Question: Sentence: 'a teenager witting on a futon couch holding gaming controls in both hands'. Find frequency of the letter 'c'

Answer: 3


Question: Sentence: 'a laptop on top of a steel over'. Find frequency of the letter 'r'

Answer:
1