dissension vs run-in

dissension

noun
  • Strong disagreement; a contention or quarrel; discord. 

  • An act of expressing dissent, especially spoken. 

run-in

noun
  • An encounter; a scrape or brush, especially one involving trouble or difficulty. 

  • The end-phase of a competition. 

adj
  • (not comparable) Having been run in before or behind previous text. 

  • (sometimes comparable) Having been run in to seat the parts. 

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