adverse possession vs occupancy

adverse possession

noun
  • A means of acquiring title to another's real property without compensation by occupying the property in a manner that has under common law the requirements of being actual, open and notorious, exclusive, hostile, under cover of claim or right, and continuous for a certain number of years. 

occupancy

noun
  • 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. 

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

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