base camp vs lodgment

base camp

noun
  • An encampment used temporarily for storing supplies and preparing for a larger activity, such as mountain climbing or hunting. 

lodgment

noun
  • An area used for lodging; a place in which a person or thing is or can be lodged. 

  • The occupation of a position by a besieging party, and the works thrown up to maintain it. 

  • The act of lodging or depositing. 

  • The condition of being lodged. 

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