liberate vs lock up

liberate

verb
  • To release from servitude or unjust rule. 

  • To release from chemical bonds or solutions. 

  • To acquire from an enemy during wartime, used especially of cities, regions, and other population centers. 

  • To release from slavery: to manumit. 

  • To release from restraint or inhibition. 

  • To acquire from another by theft or force: to steal, to rob. 

lock up

verb
  • To imprison or incarcerate (someone). 

  • To invest in something long term. 

  • To stop moving; to seize. 

  • To close all doors and windows (of a place) securely. 

  • To (mistakenly) cause or have one of one's wheels to lock up (stop spinning). 

  • To lose one's forward momentum; to freeze. 

  • To cause (a program) to cease responding or to freeze. 

  • To stop spinning due to excessive braking torque. 

  • To travel through a flight of locks on a waterway in an uphill direction. 

  • To cease responding; to freeze. 

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