onset vs truce

onset

noun
  • The initial portion of a syllable, preceding the syllable nucleus. 

  • The beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak. 

  • The initial phase of a disease or condition, in which symptoms first become apparent. 

  • A setting about; a beginning. 

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 onset and truce occurred in a corpus of books? (source: Google Ngram Viewer )