ablate vs dehydrate

ablate

verb
  • To remove or decrease something by cutting, erosion, melting, evaporation, or vaporization. 

  • To undergo ablation; to become melted or evaporated and removed at a high temperature. 

dehydrate

verb
  • to lose or remove water; to dry 

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