conquer vs defeat

conquer

verb
  • To defeat in combat; to subjugate. 

  • To overcome an abstract obstacle. 

  • To acquire by force of arms, win in war; to become ruler of; to subjugate. 

defeat

verb
  • To overcome in battle or contest. 

  • To nullify 

  • To prevent (something) from being achieved. 

  • To reduce, to nothing, the strength of. 

noun
  • The act or instance of being defeated, of being overcome or vanquished; a loss. 

  • Frustration (by prevention of success), stymieing; (law) nullification. 

  • The act or instance of defeating, of overcoming, vanquishing. 

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