catachresis vs impropriety

catachresis

noun
  • Such a misuse involving some similarity of sound between the misused word and the appropriate word. 

  • A misapplication or overextension of figurative or analogical description; a wrongly applied metaphor or trope. 

  • A misuse of a word; an application of a term to something which it does not properly denote. 

impropriety

noun
  • Improper language. 

  • The condition of being improper. 

  • An improper act. 

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