Chinaman vs Qing

Chinaman

noun
  • A sailing ship of the 18th and 19th centuries engaged in the Old China Trade 

  • Synonym of Chinaperson, a Chinese person of either gender. 

Qing

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

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