sheath vs topside

sheath

noun
  • The insulating outer cover of an electrical cable. 

  • The base of a leaf when sheathing or investing a branch or stem, as in grasses. 

  • A holster for a sword; a scabbard. 

  • A condom. 

  • The foreskin of certain animals (for example, dogs and horses). 

  • A tight-fitting dress. 

  • Anything that has a similar shape to a scabbard that is used to hold an object that is longer than it is wide. 

  • One of the elytra of an insect. 

topside

noun
  • The structure and assembly of modules above the jacket or gravity base sub structure. 

  • The surface of a ship’s hull that is above the water line. 

  • The outer side of a round of beef. 

  • The structure and assembly of modules on the deck of any floating installation. 

  • The side or part of something that is at the top. 

adv
  • Abovedeck, such as on the weather deck or bridge. 

adj
  • Abovedeck, such as on the weather deck or bridge. 

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