debark vs disbark

debark

verb
  • To remove the bark from a tree, especially one that has been felled. 

  • To devocalize (a dog). 

  • To disembark. 

  • To unload goods from an aircraft or ship. 

disbark

verb
  • To strip (a tree, etc.) of bark. 

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