fixed vs unwritten

fixed

adj
  • Attached; affixed. 

  • Of sound, recorded on a permanent medium. 

  • Resolved; corrected. 

  • Surgically rendered infertile (spayed, neutered or castrated). 

  • Not changing, not able to be changed, staying the same. 

  • Repaired 

  • Chemically stable. 

  • Supplied with what one needs. 

  • Stationary. 

  • Rigged; fraudulently prearranged. 

unwritten

adj
  • Implicit or understood but not formally articulated. 

  • Not written. 

  • Oral or otherwise communicated without writing. 

  • Containing no writing; blank. 

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