This is merely the type of Cybertronian time that I use, and find to be the most accurate. I know that you probably use another type of time, and that's okay, just know that this is the time that I use in my fanfictions.
Nano-klik - Less than a second.
Klik - Second.
Cycle - Minute.
Megacycle - Hour.
Orn - Day.
Quintun - Week.
Diun - Month.
Stellar cycle - Year.