ague vs bitterness

ague

noun
  • A chill, or state of shaking, as with cold. 

  • The cold fit or rigor of the intermittent fever 

  • An intermittent fever, attended by alternate cold and hot fits. 

verb
  • To strike with an ague, or with a cold fit. 

bitterness

noun
  • Harsh cold. 

  • The quality of eliciting a bitter, humiliating or harsh feeling. 

  • The quality of having a bitter taste. 

  • The quality of feeling bitter; acrimony, resentment; the quality of exhibiting such feelings. 

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