extermination vs sublation

extermination

noun
  • Elimination. 

  • The act of exterminating; total destruction or eradication 

sublation

noun
  • Removal, taking away. 

  • A flotation method in which the material to be separated is adsorbed on the surface of gas bubbles in a liquid and is collected on an upper layer of an immiscible liquid 

  • In Hegelian philosophy, the situation where a thesis and antithesis interact. 

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