purging vs refoulement

purging

noun
  • A removal of undesirable people. 

  • Vomiting; vomiting induced by purgatives. 

  • The cleansing of a device by flushing it with water, steam, or some other liquid or gas. 

  • The removal of excess humors through bloodletting, induced vomitting, etc. 

  • The removal of digested waste: defecation; defecation induced by laxatives. 

refoulement

noun
  • Rendition of a person to an area (chiefly their country of origin) where they will face mistreatment, for example, expulsion of refugees into a war zone; (countable) an instance of this. 

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