Machiavellianism vs unscrupulousness

Machiavellianism

noun
  • Any ruthless, duplicitous behavior. 

  • A psychological trait centered on interpersonal manipulation, unemotional coldness, and indifference to morality. 

  • A political philosophy, based on the writings of Machiavelli, especially The Prince, that advocates the use of ruthlessness and duplicity in political dealings. 

  • A political maneuver that exemplifies the philosophy. 

unscrupulousness

noun
  • the state of being unscrupulous 

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