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

Q: Sentence: 'a fluffy white car looking in a mirror'. Find frequency of the letter 'k'

A: 1
****
Q: Sentence: 'a train on a train track going through a bunch of trees'. Find frequency of the letter 'u'

A: 2
****
Q: Sentence: 'a car that is looking out the window of a toy truck'. Find frequency of the letter 'l'

A:
1
****