Jinshui vs Xicheng

Jinshui

name
  • A district of Zhengzhou, Henan, China. 

Xicheng

name
  • a subdistrict in Jingzhou, Jingzhou, Hubei, China 

  • A district in downtown Beijing, China, comprising the sections immediately west of the Forbidden City. 

  • a subdistrict in Zengdu, Suizhou, Hubei, China 

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