behavior vs ill

behavior

noun
  • The way a living creature behaves or acts generally. 

  • An instance of the way a living creature behaves. 

  • The way a device or system operates. 

  • Observable response produced by an organism. 

  • Human conduct relative to social norms. 

  • A state of probation about one's conduct. 

ill

noun
  • A physical ailment; an illness. 

  • Harm or injury. 

  • PCP, phencyclidine. 

  • Evil; moral wrongfulness. 

  • Trouble; distress; misfortune; adversity. 

adv
  • Not well; imperfectly, badly 

verb
  • To behave aggressively. 

adj
  • Unwell in terms of health or physical condition; sick. 

  • Sublime, with the connotation of being so in a singularly creative way. 

  • Indicative of unkind or malevolent intentions; harsh, cruel. 

  • Extremely bad (bad enough to make one ill). Generally used indirectly with to be. 

  • Having an urge to vomit. 

  • Unpropitious, unkind, faulty, not up to reasonable standard. 

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