exaggeration vs litotes

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. 

litotes

noun
  • An ironic figure of speech whereby something is stated by denying its opposite, particularly the negation of a negative quality to say something positive. 

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