decampment vs outgang

decampment

noun
  • A prompt departure. 

  • The act of decamping. 

outgang

noun
  • An exit or egress. 

  • An outgate; a cattle-gate. 

  • The act of giving up occupancy of property. 

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