the length of time a person has lived or a thing has existed

period of animate existence

(only in) 'the livelong day/night' = all day/night

lasting

a period of approximately one twelfth of a year

temporal length of event or entity's existence, period

(the passing of) all the days, years etc of the past, present or future; to choose or arrange the time or moment for (something)

temporal length of event or entity's existence, period

any period of seven days (especially seven days from Saturday midnight to Saturday midnight)

temporal length of event or entity's existence, period