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

Q: Sentence: 'a small white dog looking out a car window'. Find frequency of the letter 'l'

A: 3
****
Q: Sentence: 'a person on a skateboard going down a ramp'. Find frequency of the letter 'n'

A: 4
****
Q: Sentence: 'a child that is playing on a toy out in the park'. Find frequency of the letter 'd'

A:
1
****