Automatically save word document?

Hello all. My father is rather new to using computers and he primarilly uses his to type Word documents. His computer just turns off automatically sometimes (it is not a new computer), and when this happens he losses his work. I am trying to teach him to save about every five minutes, but he forgets to sometimes, and he losses hours of work. Is there some type of program that automatically saves his work like every minute or something like that? Is there some way to get Word to do this? Any help is greatly apreciated.