Zhou vs yuan

Zhou

noun
  • A people of ancient China. 

name
  • The era of Chinese history during which this dynasty ruled 

  • A dynasty of rulers over this people, who conquered the Shang kingdom and nominally ruled China until their conquest by Qin in the 3rd century BC 

  • A surname. of Chinese origin. 

  • Various regions of ancient China occupied by this people, including the Fen and Wei valleys 

  • The realm of this dynasty, surrounding the Yellow River 

  • The valley of the Luo and Yi Rivers during the Eastern Zhou dynasty 

  • The short-lived dynasty declared by Wu Zetian during the Tang 

yuan

noun
  • The basic unit of money in China. 

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