calligraphy vs graphium

calligraphy

noun
  • Any such style of decorative writing. 

  • A document written in decorative style. 

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

graphium

noun
  • A stylus (for writing). 

  • A butterfly of the genus Graphium. 

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