likely vs thinkable

likely

adj
  • Reasonably to be expected; apparently destined, probable 

  • probable; having a greater-than-even chance of occurring 

  • attractive; pleasant 

  • appropriate, suitable; believable; promising, having a good potential 

  • plausible; within the realm of credibility 

  • leading with high probability to some specified outcome 

noun
  • Something or somebody considered likely. 

adv
  • Probably. 

thinkable

adj
  • Able to be thought or imagined; conceivable. 

  • Morally acceptable or legal. 

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