invention vs truism

invention

noun
  • Something invented. 

  • The capacity to invent. 

  • The act of inventing. 

  • A small, self-contained composition, particularly those in J.S. Bach’s Two- and Three-part Inventions. 

truism

noun
  • A banality or cliché. 

  • A self-evident or obvious truth. 

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