How did scientists thought about human motivation before the term willpower came into fashion?

According to Google ngrams the term willpower wasn't used much before 1880. How did humans reason about motivation back then? What kind of conceptions of human motivation was displaced by adopting the new concept of willpower?

• That only shows that the term wasn't much written down before 1880. The word lazy however has seen pretty consistent use in the whole era of print! – Steve Jan 3 '18 at 15:12
• The carrot and the stick.... You reward them if they do what you want, you punish them if they do not. That was the only motivation for most people throughout history. – Gerald Edgar Jan 4 '18 at 1:59
• There are other languages in the world besides English. – fdb Jan 5 '18 at 0:15