g'day vs yo

g'day

intj
  • Hi, hello. 

  • Denotes the end of a radio transmission. 

yo

intj
  • A greeting similar to hi. 

  • An expression of surprise or excitement. 

  • An interjection similar to hey. 

  • Present! Here! 

  • Emphatic conclusion to a statement. 

noun
  • The letter Ё, ё. 

pron
  • third-person singular, familiar 

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