onslaught vs truce

onslaught

noun
  • A fierce attack. 

  • A large number of people or things resembling an attack. 

truce

noun
  • a period of time in which no fighting takes place due to an agreement between the opposed parties 

  • an agreement between opposed parties in which they pledge to cease fighting for a limited time 

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