arrival vs onset

arrival

noun
  • The fact of beginning to occur; the initial phase of something. 

  • The attainment of an objective, especially as a result of effort. 

  • A person who has arrived; a thing that has arrived. 

  • The act of arriving (reaching a certain place). 

  • The fact of reaching a particular point in time. 

onset

noun
  • A setting about; a beginning. 

  • 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. 

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