holster vs tube

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. 

tube

verb
  • To supply with, or enclose in, a tube. 

  • To intubate. 

  • To ride an inner tube. 

noun
  • Anything that is hollow and cylindrical in shape. 

  • The London Underground railway system, originally referred to the lower level lines that ran in tubular tunnels as opposed to the higher ones which ran in rectangular section tunnels. (Often the tube.) 

  • A television. Compare cathode ray tube and picture tube. 

  • A tin can containing beer. 

  • An approximately cylindrical container, usually with a crimped end and a screw top, used to contain and dispense semiliquid substances. 

  • An idiot. 

  • A wave which pitches forward when breaking, creating a hollow space inside. 

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