holster vs housing

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. 

verb
  • To put something in a holster. 

housing

noun
  • An appendage to the harness or collar of a harness. 

  • A mechanical component's container or covering. 

  • Residences, collectively. 

  • A niche for a statue. 

  • A houseline. 

  • That portion of a mast or bowsprit which is beneath the deck or within the vessel. 

  • A cover or cloth for a horse's saddle, as an ornamental or military appendage; a saddlecloth; a horse cloth; in plural, trappings. 

  • The activity of enclosing something or providing a residence for someone. 

  • The space taken out of one solid to admit the insertion of part of another, such as the end of one timber in the side of another. 

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