poignant vs threnetic

poignant

adj
  • Evoking strong mental sensation, to the point of distress; emotionally moving. 

  • Incisive; penetrating; piercing. 

  • Neat; eloquent; applicable; relevant. 

  • Piquant, pungent. 

threnetic

adj
  • Relating to a threne; sorrowful; mournful. 

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