commandery vs jun

commandery

noun
  • The smallest division of a manor under the control of a commander of an order of knights, originally only the Knights Hospitaller. 

  • Any of various administrative divisions of imperial China. 

  • A chapter of a secret order, especially the Knights Templar (order affiliated with Freemasonry). 

jun

noun
  • A monetary unit of North Korea and formerly of South Korea, equal to one hundredth of a won. 

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