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 dog has found a rather large stick for playing fetch'. Find frequency of the letter 't'

A: 3
****
Q: Sentence: 'a classroom setting that has people at desks with laptop computers and a projector placing an image on the screen in the front'. Find frequency of the letter 'n'

A:
8
****