lifelessness vs sameness

lifelessness

noun
  • The property of being lifeless, the lack of apparent animation. 

sameness

noun
  • A tiring lack of variety; monotony. 

  • The quality of being the same; identity. 

  • The state of being equivalent; equality. 

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