bilious vs po-faced

bilious

adj
  • Peevishly ill-humored, irritable or bad tempered; irascible. 

  • Suffering from real or supposed liver disorder, especially excessive secretions of bile. 

  • Of or pertaining to something containing or consisting of bile. 

  • Resembling bile, especially in color. 

po-faced

adj
  • Wearing a particularly stern and disapproving expression; humourless; priggish. 

  • Poker-faced. 

How often have the words bilious and po-faced occurred in a corpus of books? (source: Google Ngram Viewer )