breach of the peace vs unrest

breach of the peace

noun
  • Any public disturbance or disorderly behavior. 

  • The legal offense of engaging in public behavior which is violent, rowdy, or disruptive. 

unrest

noun
  • A state of trouble, confusion and turbulence, especially in a political context; a time of riots, demonstrations and protests. 

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