clogger vs policeman

clogger

noun
  • A maker of the shoes called clogs. 

  • A physically aggressive player. 

  • One who, or that which, clogs. 

policeman

noun
  • A glass rod capped at one end with rubber, used in a chemistry laboratory for gravimetric analysis. 

  • Any skipper of the genus Coeliades. 

  • Synonym of enforcer 

  • A male police officer, sometimes used for any police officer regardless of gender. 

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