exaggeration vs oxymoron

exaggeration

noun
  • The act of exaggerating; the act of doing or representing in an excessive manner; a going beyond the bounds of truth, reason, or justice; a hyperbolical representation; hyperbole; overstatement. 

  • The act of heaping or piling up. 

  • A representation of things beyond natural life, in expression, beauty, power, vigor. 

oxymoron

noun
  • A figure of speech in which two words or phrases with opposing meanings are used together intentionally for effect. 

  • A contradiction in terms. 

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