ax to grind vs sorrow

ax to grind

noun
  • A grudge or grievance, with implications of confrontation. 

  • A proposition or point of view to advocate, especially motivated by self-interest. 

sorrow

noun
  • (usually in plural) An instance or cause of unhappiness. 

  • unhappiness, woe 

verb
  • To feel grief over; to mourn, regret. 

  • To feel or express grief. 

How often have the words ax to grind and sorrow occurred in a corpus of books? (source: Google Ngram Viewer )