chitter-chatter vs duologue

chitter-chatter

noun
  • Light and lively discussion. 

  • Talk about trivial or nonsensical matters; inconsequential or incessant conversation. 

  • The chattering of teeth due to trembling, shivering, etc. 

verb
  • To talk trivially, nonsensically, or incessantly. 

duologue

noun
  • A conversation between two persons; dialogue. 

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

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