courser vs warhorse

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. 

warhorse

noun
  • Any horse used in horse-cavalry, but especially one bearing an armoured knight. 

  • A regularly revived theatrical or musical work, as with Hamlet or a Beethoven symphony, or as excerpts thereto. May imply that the work in question has become hackneyed. 

  • An experienced person who has been through many battles, situations or contests; someone who has given long service. 

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