bipolar vs insane

bipolar

adj
  • Relating to or having bipolar disorder. 

  • Relating to a bipole. 

  • Relating to both polar regions. 

  • Involving or having both extremes or poles at the same time. 

  • Of or relating to an international system in which two states wield most of the cultural, economic, and political influence. 

noun
  • A bipolar cell. 

insane

adj
  • Exhibiting unsoundness or disorder of mind; not sane; utterly mad. 

  • Used by or relating to insane people. 

  • Causing insanity or madness. 

  • Extremely good; incredibly amazing. 

  • Characterized by insanity or the utmost folly; ridiculous; impractical. 

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