Manchu vs Qing Empire

Manchu

adj
  • Manchurian, referring to the Manchu(rian) people. 

  • Manchurian, referring to the Manchu language. 

noun
  • A person belonging to or descended from the indigenous people of Manchuria. 

name
  • A surname. 

  • The indigenous language of the Manchu people, spoken in Manchuria. 

Qing Empire

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