Single word meaning "freshness duration"
I'm looking for a word that encapsulates the phrases "freshness duration" or "duration until something is stale".
Shelf-life seems to fit the bill.
Oxford Dictionaries (as below) | Merriam-Webster | Dictionary.com
Definition of shelf life
noun
the length of time for which an item remains usable, fit for consumption, or saleable:
the shelf life of fresh pasta
figurative
the new strategy will be lucky if it has a shelf life of more than a few months
Best before.
Use by.
Expiry date.
Use before.