ripen vs rot

ripen

verb
  • To cause (something) to mature; to make ripe 

  • to grow ripe; to become mature (said of grain, fruit, flowers etc.) 

  • To approach or come to perfection. 

  • To mature; to fit or prepare; to bring to perfection 

rot

verb
  • To make putrid; to cause to be wholly or partially decomposed by natural processes. 

  • To expose, as flax, to a process of maceration, etc., for the purpose of separating the fiber; to ret. 

  • To spend a long period of time (in an unpleasant place). 

  • To suffer decomposition due to biological action, especially by fungi or bacteria. 

  • To decline in function or utility. 

  • To (cause to) deteriorate in any way, as in morals; to corrupt. 

noun
  • Any of several diseases in which breakdown of tissue occurs. 

  • The process of becoming rotten; putrefaction. 

  • Verbal nonsense. 

  • Decaying matter. 

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