daily grind vs rat race

daily grind

noun
  • The difficult, routine, or monotonous tasks of daily work. 

rat race

noun
  • An activity or situation which is congested with participants and which is hectic or tedious, especially in the context of a busy, modern urban lifestyle. 

  • Inconsiderate or unfair competition, where the competitors are willing to do just about anything to win. 

  • The busy, modern urban lifestyle itself, especially when seen as a competition for wealth or power. 

How often have the words daily grind and rat race occurred in a corpus of books? (source: Google Ngram Viewer )