get going vs get off the ground

get going

verb
  • To begin or commence. 

  • To talk passionately without interruption. 

  • To cause someone to talk passionately without interruption. 

  • To cry or bawl loudly. 

  • To arouse sexually. 

  • To leave, or depart. 

  • To excite intellectually. 

get off the ground

verb
  • To succeed or begin to succeed. 

  • To make (something) succeed. 

How often have the words get going and get off the ground occurred in a corpus of books? (source: Google Ngram Viewer )