litotes vs personification

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. 

personification

noun
  • A literary device in which an inanimate object or an idea is given human qualities. 

  • An artistic representation of an abstract quality as a human 

  • A person, thing or name typifying a certain quality or idea; an embodiment or exemplification. 

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