holster vs scabbard

holster

verb
  • To put something in a holster. 

noun
  • A belt with loops or slots for carrying small tools or other equipment. 

  • A case for carrying a tool, particularly a gun, safely and accessibly. 

scabbard

verb
  • To put an object (especially a sword) into its scabbard. 

noun
  • The sheath of a sword. 

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