bagging vs expulsion

bagging

noun
  • The act of putting anything into a bag. 

  • peak bagging 

  • bootstrap aggregating 

  • Cloth or other material for bags. 

  • Use of BVM to ventilate a patient. 

expulsion

noun
  • The act of expelling or the state of being expelled. 

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