boldness vs spinelessness

boldness

noun
  • The relative weight of a font; the thickness of its strokes. 

  • The state of being bold; courage. 

  • presumptuousness 

spinelessness

noun
  • The state or quality of being spineless (not having a spine (literally or figuratively)); cowardice. 

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