advanced vs avant-garde

advanced

adj
  • In a late stage of development; greatly developed beyond an initial stage. 

  • with greater complexity, more difficult 

  • At or close to the state of the art. 

  • Pronounced farther to the front of the vocal tract. 

  • Indicating a time ahead of the correct time. 

  • Having moved forward in time or space (e.g. advanced ignition timing). 

avant-garde

adj
  • Innovative, pioneering, especially when extremely or obviously so. 

noun
  • Any group of people who invent or promote new techniques or concepts, especially in the arts. 

How often have the words advanced and avant-garde occurred in a corpus of books? (source: Google Ngram Viewer )