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: 'the wooden kitchen has a small child's plastic table in it'. Find frequency of the letter 'n'

A: 3
****
Q: Sentence: 'tennis player being attentive, for the ball coming'. Find frequency of the letter 'e'

A:
6
****