bear down vs beat down

bear down

verb
  • Used other than figuratively or idiomatically: see bear, down. 

  • To approach in a determined manner. 

  • To steer away from the wind; to approach from windward. 

  • To intensify one's efforts. 

  • To exert downward pressure on one's abdomen, as in giving birth, forcing out feces, and some similar bodily maneuvers. 

  • To push (someone) to the ground; to defeat, overcome. 

beat down

verb
  • Used other than figuratively or idiomatically: see beat, down. 

  • (of rain) To strike with great force. 

  • (of the sun) To shine brightly and radiate with intense heat. 

  • To wear (someone) out by repeated actions that overwhelm one's patience or strength. 

  • To forcefully diminish the power or influence of; to quell; to squash. 

  • To haggle with (someone) to sell at a lower price. 

  • To severely beat someone up. 

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