subversion vs traitorousness

subversion

noun
  • The act of overthrowing a government or a ruler; dethronement. 

  • The condition of being subverted. 

  • A systematic attempt to overthrow a government by working from within; undermining. 

  • A revision considered more similar to preceding subversions than a revision deemed a new "version" is to preceding versions. 

traitorousness

noun
  • The state or quality of being traitorous. 

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