artwork vs xylograph

artwork

noun
  • Artistic work. 

  • A painting, drawing, sculpture or other piece of creative, visual art. 

  • The graphical elements to be included in a reproduced work. 

xylograph

noun
  • A print taken from such an engraving. 

  • An engraving in wood or woodcut, especially one used in printing predating the Western tradition (14th c.). 

verb
  • To make a print from an engraving in wood. 

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