contrarian vs opposite number

contrarian

noun
  • A person who likes or tends to express a contradicting viewpoint, especially one who denounces the majority persuasion. 

  • A financial investor who tends to have an opinion of market trends at variance with most others. 

adj
  • Pertaining to or characteristic of a contrarian. 

opposite number

noun
  • A person who holds a position in an organization that corresponds to that held by another person in another organization; a counterpart 

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