carry someone's water vs venture

carry someone's water

verb
  • To do someone's bidding; to serve someone's interests. 

venture

verb
  • To put or send on a venture or chance. 

  • to dare to engage in; to attempt without any certainty of success. Used with at or on 

  • To confide in; to rely on; to trust. 

  • To risk or offer. 

  • To undertake a risky or daring journey. 

  • To say something. 

noun
  • A risky or daring undertaking or journey. 

  • An event that is not, or cannot be, foreseen. 

  • The thing risked; especially, something sent to sea in trade. 

How often have the words carry someone's water and venture occurred in a corpus of books? (source: Google Ngram Viewer )