boot camp vs guard station

boot camp

noun
  • A short, intensive, quasi-military program generally aimed at young offenders as an alternative to a jail term. 

  • Any short, intensive course of training. 

  • Initial, basic indoctrination, physical fitness training and basic instruction in service-related subjects for new recruits in the armed forces (army, Air Force, navy and Marine Corps). 

guard station

noun
  • Synonym of guardhouse. 

How often have the words boot camp and guard station occurred in a corpus of books? (source: Google Ngram Viewer )