bank statement vs savings account

bank statement

noun
  • A communication from a bank to a person holding an account in that bank, usually issued monthly, detailing the value of the holdings in that account and the effects of all transactions occurring with respect to that account. 

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 bank statement and savings account occurred in a corpus of books? (source: Google Ngram Viewer )