backstage vs offstage

backstage

adj
  • Relating to, or situated in the area behind a stage. 

  • Secret, concealed from the public. 

adv
  • Towards the area behind the stage. 

  • Out of view of the public. 

noun
  • The area behind a stage out of view of the audience where performers wait to give their show; especially that of the dressing rooms. 

  • The private portion of the space used by a business or enterprise. 

offstage

adj
  • Of or relating to that part of a stage not visible to the audience. 

  • Of or relating to the private life of a celebrity. 

adv
  • Taking place offstage (as above) 

verb
  • To relegate (part of a play) to the offstage area, rather than showing it to the audience. 

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