Absolute vs invariable

Absolute

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

invariable

noun
  • Something that does not vary; a constant. 

adj
  • Constant. 

  • Not variable; unalterable; uniform; always having the same value. 

  • That cannot undergo inflection, conjugation or declension. 

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