duologue vs parlance

duologue

noun
  • A dramatic performance or piece in the form of a dialogue limited to two speakers. 

  • A conversation between two persons; dialogue. 

parlance

noun
  • A certain way of speaking, of using words; especially that associated with a particular job or interest. 

  • Of a word, the quality of being lexicalized; especially as jargon or slang. 

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