Sizhou vs Su

Sizhou

name
  • A subprefecture of Jiangnan, in Qing-era China 

  • A prefecture of Shanxi, in imperial China 

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

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

Su

name
  • A Chinese surname from Mandarin. 

  • A diminutive of the female given name Susan and of its variant forms. 

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