demo vs lie-in

demo

noun
  • A march or gathering to make a political protest. 

  • An example of a product used for demonstration and then sold at a discount. 

  • A recording of a song meant to demonstrate its overall sound for the purpose of getting it published or recorded more fully. 

  • A demographic group. 

  • A demonstration or visual explanation. 

  • A democrat. 

  • A non-interactive audiovisual computer program developed by enthusiasts to demonstrate the capabilities of the machine. See demoscene. 

  • Demolition. 

  • An edition of limited functionality to give the user an example of how the program works. 

verb
  • To record a demo version of a song, usually not intended for commercial release. 

  • To demonstrate. 

  • To demolish (especially a house or fixture). 

lie-in

noun
  • A form of protest where a group of people lie down in a public area. 

  • A period spent lying in bed for longer than usual after one has woken up. 

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