graphium vs penmanship

graphium

noun
  • A stylus (for writing). 

  • A butterfly of the genus Graphium. 

penmanship

noun
  • Synonym of handwriting, one's own style of writing. 

  • Synonym of calligraphy, the art of beautiful writing. 

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