divergent vs incommensurable

divergent

adj
  • (said of a sequence or series) Diverging; not approaching a limit. 

  • Causing divergence of rays. 

  • Disagreeing from something given; differing. 

  • Growing further apart; diverging. 

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. 

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