inviolable vs voidable

inviolable

adj
  • Not violable; not to be infringed. 

  • Incapable of being injured or invaded; indestructible. 

  • Not susceptible to violence, or of being profaned, corrupted, or dishonoured. 

voidable

adj
  • capable of being voided or made void. 

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