calligraphy vs xylograph

calligraphy

noun
  • A document written in decorative style. 

  • Any such style of decorative writing. 

  • The art or practice of writing letters and words in a decorative style; the letters and words so written. 

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 calligraphy and xylograph occurred in a corpus of books? (source: Google Ngram Viewer )