Hellenistic Greek vs Koine

Hellenistic Greek

name

  • Synonym of Koine (the Greek language from the time of Alexander the Great) 

Koine

name

  • The “common” Greek language that developed and flourished between 300 B.C.E. and 300 C.E. (the time of the Roman Empire), and from which Modern Greek descended. It was based on the Attic and Ionian dialects of Ancient Greek. 

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