fuzzy-wuzzy vs ill-defined

fuzzy-wuzzy

adj
  • Fuzzy. 

noun
  • A Papuan, especially one who assisted the Australian military against the Japanese; a Fuzzy Wuzzy Angel. 

  • A Hadendoa warrior of the Mahdi army in the 19th century. 

ill-defined

adj
  • Poorly defined; blurry, out of focus; lacking a clear boundary. 

  • Defined in an inconsistent way. 

How often have the words fuzzy-wuzzy and ill-defined occurred in a corpus of books? (source: Google Ngram Viewer )