time of life

nouns

a period of time during which a person is normally in a particular life state
time of life
is a part of
the period during which something is functional (as between birth and death)
"the battery had a short life"; "he lived a long and happy life"
life, life-time, lifespan, lifetime
is a type of (narrower)
an amount of time
"a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period"
period, period of time, time period