gatehouse vs homeless shelter

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. 

homeless shelter

noun
  • A sanctuary for the temporary housing of domesticated animals without a home. 

  • A building set up to provide for the needs of homeless people; often including shelter, food, sanitation and other forms of support. 

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