founder vs pacemaker

founder

noun
  • One who founds or establishes (especially said of a company, project, organisation, state). 

  • One who casts metals in various forms; a caster. 

  • The iron worker in charge of the blast furnace and the smelting operation. 

  • A severe laminitis of a horse, caused by untreated internal inflammation in the hooves. 

  • Someone for whose parents one has no data. 

verb
  • To flood with water and sink. 

  • To fail; to miscarry. 

  • To disable or lame (a horse) by causing internal inflammation and soreness in the feet or limbs. 

  • To fall; to stumble and go lame, as a horse. 

pacemaker

noun
  • A set of nerves which stimulate the heart to beat. 

  • One who sets the pace in a race, to guide the others. 

  • A medical implement that is used to stimulate a heart to beat by simulating the action of the natural pacemaker. 

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