Longevity (noun)

1. The length of time that a person or thing has existed or will exist.
2. The state or quality of lasting a long time without deteriorating or wearing out.

Origin:

Late middle english: from latin longaevitas, from longus 'long' + aevum 'age'.

Examples:

1. The longevity of their marriage was a testament to their love and commitment.
2. The longevity of his reign was marked by peace and prosperity.
3. Longevity is often associated with a healthy diet and lifestyle.
4. The longevity of the product was impressive, considering its low cost.
5. Longevity runs in his family and he is expected to live a long and healthy life.