The industrial revolution changed the way people worked by providing new technology and tools.
The Emancipation Proclamation given by President Lincoln on January 1st 1863 gave rights to all African Americans, to be free, allow them to travel, and work as they wish for pay.
The two items that can result in higher interest earned are higher interest rate and higher balance, whereas greater number of withdrawals will not have any effect on the interest you earn. No matter how many times you withdraw your money from your banking account, your interest will not change.