How Many Bus Days?

Today, while I was passing out a test, one of my students, Tony, asked me what bus days were. I, of course, was clueless as to what he was talking about. Was it when school busses ran? Was it when the city busses ran? I was not sure.

I asked him to clarify. He explained that he had purchased something on-line, and the web site told him that he could expect his order in "10 to 14 bus. days."

Oh, my. And this is a student in my Business class.