checking account vs savings account

checking account

noun
  • A current account; a bank account from which money can easily be transferred, by check(US)/cheque(UK) or other means. 

savings account

noun
  • A bank account designed for a client's savings, which compared to a current account typically entails withdrawal restrictions but yields a better interest 

How often have the words checking account and savings account occurred in a corpus of books? (source: Google Ngram Viewer )