celebrate vs grieve

celebrate

verb
  • To perform or participate in, as a sacrament or solemn rite; to perform with appropriate rites. 

  • To extol or honour in a solemn manner. 

  • To honour by rites, by ceremonies of joy and respect, or by refraining from ordinary business; to observe duly. 

  • To engage in joyful activity in appreciation of an event. 

grieve

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

verb
  • To submit or file a grievance (about). 

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

  • To cause sorrow or distress to. 

  • To experience grief. 

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