anticipation vs improbability

anticipation

noun
  • Prepayment of a debt, generally in order to pay less interest. 

  • A non-harmonic tone that is lower or higher than a note in the previous chord and a unison to a note in the next chord. 

  • Prolepsis. 

  • The act of anticipating, taking up, placing, or considering something beforehand, or before the proper time in natural order. 

  • The eagerness associated with waiting for something to occur. 

improbability

noun
  • The quality or state of being improbable; unlikelihood. 

  • That which is improbable; an improbable event or result. 

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