dwelling vs occupancy

dwelling

noun
  • A house or place in which a person lives; a habitation, a home. 

occupancy

noun
  • The period of time during which someone rents or otherwise occupies certain land or premises. 

  • The act of occupying, the state of being occupied or the state of being an occupant or tenant. 

  • The specific use to which something occupied is put. 

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