approval vs welcome

approval

noun
  • An expression of favorable acceptance and encouragement; a compliment that also condones. 

  • Something mailed by a seller to a collector to match their stated interests; the collector can approve of or return the item. 

  • An expression granting permission; an indication of agreement with a proposal; an acknowledgement that a person, thing, or event meets requirements. 

welcome

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. 

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. 

intj
  • Greeting given upon someone's arrival. 

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

  • To accept something willingly or gladly. 

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