break down vs streamline

break down

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

  • To demolish, to pull down. (intentionally) 

  • 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) 

streamline

verb
  • To simplify or organize a process in order to increase its efficiency. 

  • To design and construct the contours of a vehicle etc. so as to offer the least resistance to its flow through a fluid. 

  • To modernise. 

noun
  • On a weather chart, a line that is tangent to the flow of the wind. 

  • A line that is tangent to the velocity of flow of a fluid; equivalent to the path of a specific particle in that flow. 

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