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

Q: Sentence: 'a train going over a bridge with some buildings in the background'. Find frequency of the letter 'd'

A: 3
****
Q: Sentence: 'a gourmet looking hamburger with fries on a dining table with some wine'. Find frequency of the letter 't'

A: 4
****
Q: Sentence: 'a bowl full of colorful pasta with lots of vegetables'. Find frequency of the letter 'a'

A:
4
****