healing vs viperous

healing

noun
  • The process where the cells in the body regenerate and repair themselves. 

  • An act of healing, as by a faith healer. 

  • The psychological process of dealing with a problem or problems. 

viperous

adj
  • of or pertaining to a viper 

  • venomous, malicious or treacherous 

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