unsoundness vs visitation

unsoundness

noun
  • The state of being unsound. 

visitation

noun
  • An affliction or disaster attributed to destiny, or to God. 

  • A punishment or blessing ordained by God. 

  • An unusual and extensive irruption of a species of animals into another region. 

  • The right of a separated or divorced parent to visit a child; access. 

  • The act of visiting, or an instance of being visited. 

  • An encounter with supernatural beings such as ghosts or aliens. 

  • An official visit to inspect or examine something. 

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