enjoyment vs unenthusiasm

enjoyment

noun
  • An activity that gives pleasure. 

  • The exercise of a legal right. 

  • The condition of enjoying anything. 

  • An enjoyable state of mind. 

unenthusiasm

noun
  • Lack of enthusiasm. 

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