期

summer term (e.g. school); summer period

middle period

medium-term

irregular (schedule, service, etc.); indeterminate (length of time); staggered (payments)

fixed interval; fixed period

golden age; prime; heyday; height of prosperity

season (for fruit, vegetables, etc.); best time

Computing

initialization (of a variable); initialisation

Computing

formatting (a disk); initialization

Computing

initialization (of a device); (factory) reset

Biochemistry

reprogramming

Astronomy

epoch

marriageable age; chance of marriage

Colloquial

period (of life) when one is enjoying more romantic attention than usual

prison term

indefinite

lengthening

test period; exam period; examination time

one term; one period

first term; first period

long-term stay

to be postponed; to be deferred; to be delayed

to become experienced (after many years of practice)

to become worn (through long use); to show its age

short-term

suitable age (esp. for marriage); marriageable age

this point; now; this late in the game

length of one's stay

one's whole life; one's lifetime

once-in-a-lifetime encounter; uniquely precious experience; one lifetime, one meeting

classmate; graduates in the same class

Sumo

wrestlers who began their professional careers in the same tournament