concordance vs dissimilitude

concordance

noun
  • Agreement; accordance; consonance. 

  • A list of occurrences of a word or phrase from a corpus, with the immediate context. 

  • An alphabetical verbal index showing the places in the text of a book where each principal word may be found, with its immediate context in each place. 

dissimilitude

noun
  • The quality of being diverse or different; lack of resemblance. 

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