ax to grind vs rage

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. 

rage

noun
  • Violent uncontrolled anger. 

  • A current fashion or fad. 

verb
  • To act or speak in heightened anger. 

  • To move with great violence, as a storm etc. 

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