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

Q: Sentence: 'a group of people walking down a rain soaked street with umbrellas'. Find frequency of the letter 'w'

A: 3
****
Q: Sentence: 'a small white dog looking out a car window'. Find frequency of the letter 'l'

A: 3
****
Q: Sentence: 'one plate has biscuits and gravy and the other plate has sweet potato fries'. Find frequency of the letter 'b'

A:
1
****