regret vs welcome

regret

verb
  • To feel sorry about (a thing that has or has not happened), afterthink: to wish that a thing had not happened, that something else had happened instead. 

  • To feel sorry about (any thing). 

noun
  • Emotional pain on account of something done or experienced in the past, with a wish that it had been different; a looking back with dissatisfaction or with longing. 

  • The amount of avoidable loss that results from choosing the wrong action. 

welcome

verb
  • To affirm or greet the arrival of someone, especially by saying "Welcome!". 

  • To accept something willingly or gladly. 

intj
  • Greeting given upon someone's arrival. 

adj
  • Whose arrival is a cause of joy; received with gladness; admitted willingly to the house, entertainment, or company. 

  • Producing gladness. 

  • Free to have or enjoy gratuitously. 

noun
  • The utterance of such a greeting. 

  • The act of greeting someone’s arrival, especially by saying "Welcome!"; reception. 

  • Kind reception of a guest or newcomer. 

  • The state of being a welcome guest. 

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