bullpen vs lockup

bullpen

noun
  • An enclosed area used to hold bulls. 

  • The relief pitchers of a team collectively. 

  • A place for someone or something to get ready. 

  • An enclosed area for pitchers to warm up in during a game. 

  • An open seating arrangement where project teams can communicate openly with minimal effort. 

lockup

noun
  • A storage unit with a door secured by a padlock or deadbolt; a garage. 

  • A condition where a system stops responding to inputs; a freeze. 

  • A device for locking type into position for printing. 

  • A jail cell, or a period of incarceration. 

  • A condition in which one or more of a vehicle's wheels suddenly cease to rotate due to the application of excessive brake torque, causing the affected wheel(s) to skid. 

  • A fixed layout involving one or more logos and possibly related text. 

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