confusion vs self-confidence

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-confidence

noun
  • A measure of one's belief in one's own abilities 

  • The state of being self-confident 

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