altered vs incommensurable

altered

noun
  • A kind of car in drag racing, usually with a partial body situated behind the exposed engine. 

adj
  • Neutered; having had testicles or uterus and ovaries removed to prevent procreation. 

  • Having been changed from an original form. 

incommensurable

noun
  • An incommensurable value or quantity; an irrational number. 

adj
  • Not able to be measured by the same standards as another term in the context. 

  • having a ratio that is not expressible as a fraction of two integers. 

  • having no common integer divisor except 1. 

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