ax to grind vs rumble

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. 

rumble

noun
  • A street fight or brawl. 

  • A rotating cask or box in which small articles are smoothed or polished by friction against each other. 

  • A low, heavy, continuous sound, such as that of thunder or a hungry stomach. 

intj
  • An onomatopoeia describing a rumbling noise 

verb
  • To move while making a rumbling noise. 

  • To make a low, heavy, continuous sound. 

  • To fight; to brawl. 

  • to provide haptic feedback by vibrating. 

  • To cause to pass through a rumble, or polishing machine. 

  • To discover deceitful or underhanded behaviour. 

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