drilling vs proselytism

drilling

noun
  • A heavy, twilled fabric of linen or cotton; drill. 

  • Act of drilling. 

  • A long firearm with three barrels (typically a mix of shotgun and rifle barrels). 

proselytism

noun
  • The practice of proselytizing or the state of being a proselyte 

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