Byzantine Greek vs Byzantine Greek language

Byzantine Greek

name

  • Collectively, the continuum of forms of the Greek language as written and spoken during the time of the Byzantine Empire (C.E. 330–1453), preceded by Koine Greek and Early Medieval Greek and succeeded by Late Medieval Greek to Modern Greek. (ISO 639-3 code: grc shared with Classical Greek.) 

Byzantine Greek language

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