courser vs miler

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. 

miler

noun
  • An athlete or a horse who specializes in running races of one mile, or a specified number of miles. 

  • A race whose length is the specified number of miles. 

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