feasibility vs likelihood

feasibility

noun
  • The state of being feasible or possible. 

likelihood

noun
  • The probability of a specified outcome; the chance of something happening; probability; the state or degree of being probable. 

  • The probability that some fixed outcome was generated by a random distribution with a specific parameter. 

  • Likeness, resemblance. 

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