noneffective vs unusable

noneffective

adj

  • Not effective. 

  • Not able to assume active duty. 

noun

  • A member of the military who is unable to assume active duty. 

unusable

adj

  • Not usable. 

noun

  • Something that is not fit for use. 

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