period
smallest temporal unit after which a process repeats
rotation period
(of a celestial object) time that it takes to complete one revolution around its axis of rotation relative to the background stars
Eclipse season
Period when eclipses can occur
orbital period
time taken for a given object to make one complete orbit around another object, and applies in astronomy to mostly either planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars
slack water
short period in a body of tidal water when the water is completely unstressed, and there is no movement either way in the tidal stream, and which occurs before the direction of the tidal stream reverses
brewing year
brewing year of beer in Europe
appreciation period
marketing method and means to protect consumers: time limit after the customer purchases they can return it and the industry must compensate; TW, Yuan has a law for some products; IP is controversial due to technical issues; range from 1-4w