Rivers vs Xicheng

Rivers

name
  • A town in Manitoba, Canada. 

  • A state of Nigeria in the South South geopolitical zone. Capital and largest city: Port Harcourt. 

  • A surname. 

Xicheng

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

  • a subdistrict in Zengdu, Suizhou, Hubei, China 

  • a subdistrict in Jingzhou, Jingzhou, Hubei, China 

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