good day vs how

good day

how

noun
  • A small hill in northern England. (Usage preserved mainly in place names.) 

  • The means by which something is accomplished. 

  • An artificial barrow or tumulus. 

adv
  • Used as a modifier to indicate surprise, delight, or other strong feelings in an exclamation. 

  • To what degree or extent. 

  • By what means. 

  • In what manner 

  • With overtones of why, for what reason. 

  • With what meaning or effect. 

  • By what title or what name. 

  • At what price, for what amount (of money). 

  • In what state or condition. 

  • In what form, shape, measure, quantity, etc. 

conj
  • That, the fact that. 

  • In any way in which; in whatever way; however. 

  • The manner or way in which. 

  • She told me how her father was a doctor. 

intj
  • A greeting, used in representations of Native American speech. 

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