deformity vs disarticulation

deformity

noun
  • The state of being deformed. 

  • An ugly or misshapen feature or characteristic. 

disarticulation

noun
  • The act of disarticulating. 

  • Some amputations: where a joint is disarticulated: e.g. knee, hip, elbow or shoulder disarticulation. 

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