disbark vs exfoliate

disbark

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

exfoliate

verb
  • To remove the leaves from a plant. 

  • To remove a layer of skin, as in cosmetic preparation. 

  • To split into scales, especially to become converted into scales as the result of heat or decomposition. 

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