oddity vs usualness

oddity

noun
  • Strangeness. 

  • An odd or strange thing or opinion. 

  • A strange person; an oddball. 

usualness

noun
  • The quality or state of being usual. 

  • Something that is usual. 

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