life's a bitch vs that's the way life is

life's a bitch

phrase
  • Life can be tough, unpleasant, unrewarding. 

that's the way life is

proverb
  • That is the way things happen 

  • Certain things cannot be changed, helped or improved; struggle and objection are pointless. 

How often have the words life's a bitch and that's the way life is occurred in a corpus of books? (source: Google Ngram Viewer )