Hellenistic Greek vs Hellenistic Koine

Hellenistic Greek

name

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

Hellenistic Koine

name

  • Synonym of Koine (the Greek dialect of Hellenistic times) 

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