correspondent vs incommensurable

correspondent

adj
  • Corresponding; suitable; adapted; congruous. 

  • Conforming; obedient. 

noun
  • Someone who or something which corresponds. 

  • A journalist who sends reports back to a newspaper or radio or television station from a distant or overseas location. 

  • Someone who communicates with another person, or a publication, by writing. 

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 correspondent and incommensurable occurred in a corpus of books? (source: Google Ngram Viewer )