indoors vs topside

indoors

noun
  • The interior of a building; the space inside buildings generally. 

adv
  • Inside, into, or within a building. 

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. 

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

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

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