epee vs skean

epee

noun
  • A sharp-pointed dueling sword with a bell-shaped guard, used (with the end blunted) in sport fencing. 

skean

noun
  • A double-edged, leaf-shaped, typically bronze dagger formerly used in Ireland and Scotland. 

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