Helium Half-Lives
Attosecond
Femtosecond
Picosecond
Nanosecond
Microsecond
High Speed Camera Shutter
Millisecond
Flash
Camera Flash Sync Speed
Hummingbird Wingbeat Rate
A Blink Of An Eye
Atom
Second
Minute
Swatch Beat
Moment
Ostent
Hour
Day (Mean Solar Day)
Week
Fortnight
Vinal
Nodical month
Sidereal month
Anomalistic month
Lunar month
Financial month
Quarter
Financial Year (Tun)
Year
Solar Year
Averaged Calendar Year
Synodic Year
Leap Year
Decade
Metonic Cycle
Katun
Score
Generation
Sovereign Cycle
Callipic Cycle
Century
Baktun
Millenium
Bismuth Half-Lives