achievability vs likelihood

achievability

noun
  • The state or condition of being achievable. 

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 achievability and likelihood occurred in a corpus of books? (source: Google Ngram Viewer )