duration

timer

Duration-tracking mechanism

• stopwatchInterval timing device
• clockDevice displaying time
• hourglassGravity-powered sand timer

sundial · chronometer · metronome · timestamp · countdown · elapsed · runtime · playtime · airtime · turnaround

length

Measure of extent

• extentRange or magnitude
• periodPunctuation ending sentences
• stretchPull to extend

interval · term · timespan · lifespan · spell · stint · tenure · run · course · continuance

second

Unit smaller than minute

• minuteSixtieth of an hour
• hourSixty-minute span
• day24-hour period

week · month · year · decade · century · millennium · eon · epoch · era · age

stamina

Capacity for sustained effort

• resilienceCapacity to recover quickly
• persistenceContinuing despite difficulty
• perseveranceSustained resolve despite obstacles

fortitude · tenacity · grit · steadfastness · patience · survival · hardiness · constancy · longevity · marathon

ephemeral

Lasting very briefly

• transientTemporary, soon departing
• fleetingPassing very quickly
• momentaryLasting very briefly

brief · short-lived · impermanent · passing · evanescent · transitory · provisional · interim · volatile · temporary

note

Short written record

• restCessation of activity
• wholeFull and undivided
• halfEqual portion of two

quarter · eighth · sixteenth · fermata · sustain · held · tied · beat · bar · tempo

• timekeepingclock, watch, watches, clocks, timer
• time conceptsclock, calendar, hour, minute, second
• schedulingappointments, appointment, calendar, booking, bookings
• scheduling termsASAP, appointment, meeting, booking, reservation
• time spanssecond, minute, hour, day, week
• time termsdate, time, start date, datetime, end date