courser vs trooper

courser

noun
  • A racehorse or a charger. 

  • A person who practises coursing. 

  • Any of several species of bird in the genera Cursorius or Rhinoptilus of the family Glareolidae. 

  • A dog used for coursing. 

  • A stone used in building a course. 

  • A hunter. 

trooper

noun
  • A cavalry horse; a charger. 

  • One who endures adversity or hardship with an attitude of stoicism and persistence. 

  • A mounted policeman. 

  • A soldier. 

  • A soldier of private rank in cavalry or armour. 

  • A troopship. 

verb
  • To work steadily at an unpleasant job without complaint. 

  • To work as a trooper. 

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