buskin vs half-boot

buskin

noun
  • A half-boot. 

  • Tragic drama; tragedy. 

  • An instrument of torture for the foot; bootikin. 

  • A type of half-boot with a high heel, worn by the ancient Athenian tragic actors. 

half-boot

noun
  • A boot with a short top covering only the ankle. 

How often have the words buskin and half-boot occurred in a corpus of books? (source: Google Ngram Viewer )