In this task, you need to count the number of times the given letter appears in the given sentence.

Q: Sentence: 'old double decker bus parked in a lot'. Find frequency of the letter 't'

A: 1
****
Q: Sentence: 'a street at night with trees and streetlights on'. Find frequency of the letter 't'

A: 9
****
Q: Sentence: 'a single person skiing down a trail along a lot of trees'. Find frequency of the letter 'a'

A:
5
****