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

Q: Sentence: 'a plane with stairs next to it sitting in a large lot'. Find frequency of the letter 'i'

A: 6
****
Q: Sentence: 'a toilet of some sort near a sink of some sort'. Find frequency of the letter 'o'

A: 7
****
Q: Sentence: 'people on surfboards are riding the waves in the water'. Find frequency of the letter 'o'

A:
3
****