asymmetry vs unnaturalness

asymmetry

noun
  • The lack of a common measure between two objects or quantities; incommensurability. 

  • Absence of symmetry or proportion between the parts of a thing, or a distinction that produces such a lack of symmetry. 

unnaturalness

noun
  • The state of being unnatural. 

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