Decade
A decade was a time period of ten years.

According to Sub-commander T'Pol, the soil and foliage of Terra Nova would be irradiated for at least another decade as of 2151. ()

Travis Mayweather told T'Pol at dinner in the captain's mess that Earth spent years and decades to solve the mysteries of Amelia Earhart and Judge Crater. ()

According to  in the mirror universe, a Human lost a decade off their life expectancy for every year spent working near a warp core. ()

External link 
 
Time measurements