beat down vs retard

beat down

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

  • (of rain) To strike with great force. 

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

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

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

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

  • To severely beat someone up. 

retard

verb
  • To decelerate; to slow down. 

  • To put off; to postpone. 

  • To keep delaying; to continue to hinder; to prevent from progressing. 

noun
  • Retardation; delay. 

  • A slowing down of the tempo; a ritardando. 

  • A person or being who is extremely stupid or slow to learn. 

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