liquidator vs plugger

liquidator

noun
  • One who liquidates. 

  • Any of the workers involved in cleaning up the Chernobyl disaster 

  • One supporting the political policy of liquidationism; a liquidationist. 

plugger

noun
  • One who, or that which, plugs. 

  • A thong or flip-flop. 

  • A dental instrument used to insert fillings. 

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