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

Q: Sentence: 'a picture of a toilet and toilet paper in a bathroom'. Find frequency of the letter 'o'

A: 5
****
Q: Sentence: 'a bunch of broken down trains sit in a yard'. Find frequency of the letter 'n'

A: 5
****
Q: Sentence: 'a white bowl full of food sitting on a table'. Find frequency of the letter 'u'

A:
1
****