ambition vs ripen

ambition

verb
  • To seek after ambitiously or eagerly; to covet. 

noun
  • Eager or inordinate desire for some object that confers distinction, as preferment, honor, superiority, political power, or fame; desire to distinguish one's self from other people. 

  • An object of an ardent desire. 

  • A personal quality similar to motivation, not necessarily tied to a single goal. 

  • A desire, as in (sense 1), for another person to achieve these things. 

ripen

verb
  • To approach or come to perfection. 

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

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

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

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