seating vs subfloor

seating

noun
  • That part of the floor which rests on the keel. 

  • The provision of chairs or other places for people to sit. 

  • The act of one that seats. 

  • Collectively, the various fitted supports of the parts of a structure or of a machine; a housing in which a component is seated. 

  • Material for making seats. 

  • A period of time in which people are allowed into a performance, a meal, etc., to be seated. 

subfloor

noun
  • The floor structure supporting and underlying the visible flooring or other finishing surface such as a carpet 

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