Ancient Greek vs Old Greek

Ancient Greek

name

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

noun

  • A native or inhabitant of Ancient Greece. 

adj

  • Of or relating to Ancient Greece. 

Old Greek

name

  • A form of the Greek language intermediate between Ancient Greek and Modern Greek; spoken roughly between the 1st and 16th centuries. 

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