atrocity vs malapropism

atrocity

noun
  • An object considered to be extremely unattractive or undesirable. 

  • An extremely cruel act; a horrid act of injustice. 

  • The quality or state of being atrocious; enormous wickedness; extreme criminality or cruelty. 

malapropism

noun
  • The blundering use of an absurdly inappropriate word or expression in place of a similar-sounding one. 

  • An instance of this; malaprop. 

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