Ancient Greek vs Demotic Greek

Ancient Greek

noun

A native or inhabitant of Ancient Greece.

name

Any of the various forms of the Greek language of classical antiquity, particularly the classical Attic dialect used in Athenian literature.

adj

Of or relating to Ancient Greece.

Demotic Greek

noun

The Modern Greek vernacular language. It became the official Modern Greek in 1976 when Katharevousa was replaced, and was written in polytonic script until 1982, and in monotonic script after 1982.

How often have the words Ancient Greek and Demotic Greek occurred in a corpus of books? (source: Google Ngram Viewer )