coalesce vs diverge

coalesce

verb
  • To merge, to intermingle freely. 

  • To form from different pieces or elements. 

  • To bond pieces of metal into a continuous whole by liquefying parts of each piece, bringing the liquids into contact, and allowing the combined liquid to solidify. 

  • To join into a single mass or whole. 

diverge

verb
  • To run apart; to separate; to tend into different directions. 

  • To separate, to tend into a different direction (from another line or path). 

  • To become different; to run apart; to separate; to tend into different directions. 

  • To become different, to separate (from another line or path). 

  • Not to converge: to have no limit, or no finite limit. 

  • Both stories start out the same way, but they diverge halfway through. 

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