Long division is a mathematical operation used to divide one number by another. It is an important skill for students to learn in order to understand more complex mathematics. The term 'long division' can be broken down into three parts: EON (3 letters), SCHISM (6 letters), and ERA (3 letters). EON refers to an indefinitely long period of time, SCHISM is a division or separation into two parts, and ERA is a period of time marked by a particular set of characteristics. Together, these three words describe the process of dividing one number by another over a long period of time.