Jurchen vs Qing

Jurchen

name
  • An extinct Tungusic language (code jur), related to Manchu. 

noun
  • A member of a medieval and early modern Tungusic people, progenitors of the Manchus. 

Qing

name
  • Qing dynasty (1644–1912), the last imperial dynasty of China. 

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