camping vs gatehouse

camping

noun
  • The act of setting up a camp. 

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

gatehouse

noun
  • A shelter for a gatekeeper. 

  • A lodge besides the entrance to an estate; often the residence of a gatekeeper; also a dwelling formerly used as such a residence. 

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