Millisecond (ms)
Definition: Millisecond na one thousandth of one second.
History/origin: Millisecond come more important with telegraphy, industrial control, computing, and modern user-interface timing.
Current use: Milliseconds common for software performance, gaming latency, response times, and many industrial or medical devices.
Year (yr)
Definition: Year na long calendar unit based on Earth solar orbit. For unit conversion, dem dey commonly average am as 365.25 days.
History/origin: People organize years around seasons, planting cycles, and sky observations, then dem refine am through calendars for civic and scientific use.
Current use: yr dey used for ages, anniversaries, mortgages, warranties, leases, climate averages, school grades, investment horizons, history timelines, and long-term records.