apologize vs grieve

apologize

verb
  • To express regret that a certain event has occurred. 

  • To make an apology or excuse; to acknowledge some fault or offense, with expression of regret for it, by way of amends 

grieve

verb
  • To experience grief. 

  • To submit or file a grievance (about). 

  • To feel very sad about; to mourn; to sorrow for. 

  • To cause sorrow or distress to. 

noun
  • A manager or steward, e.g. of a farm. 

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