choleric vs unflappable

choleric

noun
  • A person with a choleric temperament. 

  • A person suffering from cholera (infectious disease). 

adj
  • Of or relating to cholera (infectious disease). 

  • Having a temperament characterized by an excess of choler; easily becoming angry. 

  • Showing or expressing anger. 

unflappable

adj
  • Remaining composed and level-headed at all times; impossible to fluster; not becoming frustrated or irritated easily. 

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