aphorism vs epigram

aphorism

noun
  • A concise, terse, laconic, or memorable expression of a general truth or principle. 

verb
  • To speak or write aphorisms. 

epigram

noun
  • A brief but witty saying. 

  • A short, witty or pithy poem. 

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