carry someone's water vs loan

carry someone's water

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

loan

verb
  • To lend (something) to (someone). 

noun
  • An act or instance of lending, an act or instance of granting something for temporary use. 

  • A lonnen. 

  • A sum of money or other property that a natural or legal person borrows from another with the condition that it be returned or repaid over time or at a later date (sometimes with interest). 

  • The permission to borrow any item. 

  • The contract and array of legal or ethical obligations surrounding a loan. 

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