base camp vs establishment

base camp

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

establishment

noun
  • That which is established; as a form of government, a permanent organization, business or force, or the place where one is permanently fixed for residence. 

  • The ruling class or authority group in a society; especially, an entrenched authority dedicated to preserving the status quo. Also Establishment. 

  • The number of staff required to run a department or organisation (often used in the context of healthcare and other public services). 

  • The act of establishing; a ratifying or ordaining; settlement; confirmation. 

  • The state of being established, founded, etc.; fixed state. 

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