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

Sentence: 'a kitchen with hanging lights, an island with sink and bar stools, a refrigerator, small pantry door, wooden cabinets and shiny wood floor'. Find frequency of the letter 'n'
12

Sentence: 'a plastic container next to a toilet on a wooden box'. Find frequency of the letter 'i'
3

Sentence: 'two people riding motorcycles down a city street'. Find frequency of the letter 'e'

5