confusion vs self-mastery

confusion

noun
  • The act of mistaking one thing for another or conflating distinct things. 

  • A lack of clarity or order. 

  • The state of being confused; misunderstanding. 

  • Lack of understanding due to dementia. 

self-mastery

noun
  • The conscious control of one's behaviour; self-command. 

How often have the words confusion and self-mastery occurred in a corpus of books? (source: Google Ngram Viewer )