camping vs dormitory

camping

noun
  • The recreational activity of temporarily living in a tent or similar accommodation, usually in the wilderness. 

  • The act of setting up a camp. 

dormitory

noun
  • A room containing a number of beds (and often some other furniture and/or utilities) for sleeping, often applied to student and backpacker accommodation of this kind. 

  • A building or part of a building which houses students, soldiers, monks etc. who sleep there and use communal further facilities. 

  • A dormitory town. 

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