medieval vs past one's sell-by date

medieval

adj

Of or relating to the Middle Ages, the period from approximately 500 to 1500 AD.
Archaic.
Brutal.

noun

Someone living in the Middle Ages.
A medieval example (of something aforementioned or understood from context).

past one's sell-by date

How often have the words medieval and past one's sell-by date occurred in a corpus of books? (source: Google Ngram Viewer )