actuality vs perdurant

actuality

noun
  • The state of existing; existence. 

  • Live reporting on current affairs. 

  • An instance or quality of being actual or factual; fact. 

  • A short early motion picture. 

perdurant

noun
  • A happening; an entity that only exists partially at any given point in time. 

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