off-ramp vs outgang

off-ramp

noun
  • An exit strategy. 

  • A segment of roadway that directs vehicular traffic from a freeway onto local roads. 

outgang

noun
  • An exit or egress. 

  • An outgate; a cattle-gate. 

  • The act of giving up occupancy of property. 

How often have the words off-ramp and outgang occurred in a corpus of books? (source: Google Ngram Viewer )