confusion vs disuse

confusion

noun
  • The state of being confused; misunderstanding. 

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

  • A lack of clarity or order. 

  • Lack of understanding due to dementia. 

disuse

noun
  • The state of not being used; neglect. 

verb
  • To cease the use of. 

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