concordance vs lumping together

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. 

lumping together

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