free space vs room

free space

noun
  • Used other than figuratively or idiomatically: see free, space. 

  • vacuum; a space free of matter. 

room

noun
  • Space for something, or to carry out an activity. 

  • The people in a room. 

  • A space between the timbers of a ship's frame. 

  • Place or position in society; office; rank; post, sometimes when vacated by its former occupant. 

  • A quantity of furniture sufficient to furnish one room. 

  • Sufficient space for or to do something. 

  • A set of rooms inhabited by someone; one's lodgings. 

  • An area for working in a coal mine. 

  • A separate part of a building, enclosed by walls, a floor and a ceiling. 

  • A portion of a cave that is wider than a passage. 

  • An IRC or chat room. 

  • (One's) bedroom. 

adv
  • Off from the wind. 

verb
  • To assign to a room; to allocate a room to. 

  • To reside, especially as a boarder or tenant. 

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