cantonment vs supply depot

cantonment

noun
  • A permanent military station. 

  • Temporary military living quarters. 

  • A town or village, or part of a town or village, assigned to a body of troops for quarters. 

supply depot

noun
  • A facility utilized by armies to store battlefield supplies temporarily on or near the front lines until they can be distributed to army units. 

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