courser vs rug

courser

noun
  • A dog used for coursing. 

  • A person who practises coursing. 

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

  • A stone used in building a course. 

  • A racehorse or a charger. 

  • A hunter. 

rug

noun
  • A rough, woolly, or shaggy dog. 

  • A dense growth of chest hair. 

  • A (usually thick) piece of fabric used for warmth (especially on a bed); a blanket. 

  • A cloth covering for a horse. 

  • A wig; a hairpiece. 

  • A partial covering for a floor. 

  • The female pubic hair. 

verb
  • To pull roughly or hastily; to plunder; to spoil; to tear. 

  • To cover with a rug. 

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