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

Q: Sentence: 'a man skating down a stair rail in front of a bunch of people'. Find frequency of the letter 'o'

A: 5
****
Q: Sentence: 'a scene at night; a plane alone on a runway with lit-up city buildings on the horizon'. Find frequency of the letter 'w'

A: 2
****
Q: Sentence: 'lady being served a plate of ice cream in a restaurant'. Find frequency of the letter 'd'

A:
2
****