incommensurable vs incongruous

incommensurable

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

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

  • having no common integer divisor except 1. 

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

incongruous

adj
  • Of two numbers, with respect to a third, such that their difference can not be divided by it without a remainder. 

  • Not similar or congruent; not matching or fitting in. 

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