diplomatic vs expert

diplomatic

noun
  • The science of diplomas, or the art of deciphering ancient writings and determining their age, authenticity, etc.; paleography. 

adj
  • Exhibiting diplomacy; exercising tact or courtesy; using discussion to avoid hard feelings, fights or arguments. 

  • describing a publication of a text which follows a single basic manuscript, but with variants in other manuscripts noted in the critical apparatus 

  • Concerning the relationships between the governments of countries. 

  • Relating to diplomatics, or the study of old texts; paleographic. 

expert

noun
  • A person with extensive knowledge or ability in a given subject. 

  • A player ranking just below master. 

adj
  • Extraordinarily capable or knowledgeable. 

  • Characteristic of an expert. 

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