Well of course if it doesn't get used then most people will not be familiar with it — that's the point. We should encourage the use so people become familiar wi

Well of course if it doesn't get used then most people will not be familiar with it — that's the point. We should encourage the use so people become familiar with them, so we can stop using "thousands of" and "millions of". Re kHz, I think most people understand frequencies we can hear. (1 kHz is close to a high C note). MHz and GHz are radio frequencies.