Sizhou vs Xi

Sizhou

name

  • A prefecture of Shanxi, in imperial China 

  • A subprefecture of Jiangnan, in Qing-era China 

  • A town in Sizhou prefecture, Shanxi, in imperial China 

  • A town in Sizhou, Jiangnan, in Qing-era China 

Xi

name

  • A county of Linfen, Shanxi, China. 

  • A river in China, the western tributary of the Pearl. 

  • Xi Jinping, current General Secretary of the Chinese Communist Party (2012–present). 

  • A surname from Chinese 

noun

  • Capital Greek letter Ξ (X) 

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