achieve vs break down

achieve

verb
  • To carry out successfully; to accomplish. 

  • Show all the spoils by valiant kings achieved. 

  • To succeed in something, now especially in academic performance. 

  • To obtain (a material thing). 

  • To obtain, or gain (a desired result, objective etc.), as the result of exertion; to succeed in gaining; to win. 

break down

verb
  • To demolish, to pull down. (intentionally) 

  • To divide into parts to give more details, to provide a more indepth analysis of. 

  • To (cause to) decay, to decompose. 

  • To cease to function. (others) 

  • To stop functioning. (machine, computer, vehicle) 

  • To fail, especially socially or for political reasons. 

  • To give in, relent, concede, or surrender. 

  • To render or to become weak and ineffective. 

  • To digest. 

  • To render or to become unstable due to stress, to collapse physically or mentally. 

  • To collapse, physically or in structure. (unexpectedly) 

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