Absolute vs ne plus ultra

Absolute

noun
  • That which is totally unconditioned, unrestricted, pure, perfect, or complete; that which can be thought of without relation to others. 

ne plus ultra

noun
  • The perfect or most extreme example of its kind; the ultimate. 

  • A prohibition against proceeding further; an insuperable obstacle or limiting condition. 

  • The highest, ultimate point of achievement which can be reached; perfection. 

How often have the words Absolute and ne plus ultra occurred in a corpus of books? (source: Google Ngram Viewer )