olemus
olemi eksisteerimiskestus kontekstist sõltuvas tähenduses

Wiktionary:
1. the duration of the life of someone or something
Synonym: lifespan

näiteid
https://en.wikipedia.org/wiki/Product_lifetime

https://en.wikipedia.org/wiki/Object_lifetime

https://www.igi-global.com/dictionary/network-lifetime/20144

https://www.energy.gov/sites/prod/files/2014/04/f14/life-reliability_fact-sheet.pdf

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