art object vs ornamentation

art object

noun
  • Synonym of objet d'art (“artwork”) 

ornamentation

noun
  • Decoration, adornment or embellishment. 

  • The act or process of decorating etc. 

  • Short notes added to a composition to emphasize certain notes and to add style. 

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