ablation vs amputation

ablation

noun
  • The surgical removal of a body part, an organ, or especially a tumor; the removal of an organ function; amputation. 

  • The depletion of surface snow and ice from a spacecraft or meteorite through melting and evaporation caused by friction with the atmosphere. 

  • The removal of a glacier by melting and evaporation; the lowering of a land surface by any of several means, as in wind erosion or mass wasting. 

amputation

noun
  • surgical removal of all or part of a limb, etc. 

  • the loss of a limb, etc. through trauma 

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