Japanese vs Nipponic

Japanese

adj
  • Of, relating to, or derived from Japan, its people, language, or culture. 

name
  • A language that is primarily spoken in East Asia and is the official language of Japan. 

noun
  • A person living in or coming from Japan, or of Japanese ancestry. 

  • Japanese food. 

Nipponic

adj
  • Of or relating to Nippon (i.e. Japan); Japanese. 

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