bleed out vs bleed-out

bleed out

verb
  • To die due to excess bloodloss; to bleed to death. 

  • To kill by causing such bloodloss. 

  • To leak out; to spread. 

noun
  • An instance of exsanguination or of major blood loss. 

  • An instance of any system or item that loses its necessary components, such as a machine and its fuel or a company and its money. 

bleed-out

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