My only time was way back when WJIB FM was playing "Beautiful" music. The woman on the other end finally said she didn't know any thing about WJIB, and I said, "They play dentist office music."
Come to think of it, it must have been when they were doing an awful lot of advertising on tv, too.
the closest I got to it was back in the late 70s or early 80s when it was a mail in survey for “RAM” _-Radio Audience
Measuring. Early 80s, I think...at the time I was maybe 20
or so and put down WDLW, an AM country station in Boston!