Ching vs Manchu

Ching

name

  • A surname from Cantonese. 

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. 

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