The term 'Notable Period of Time' can be summed up by the crossword solution 'ERA'. An ERA is a period of time marked by certain characteristics or events. It is usually used to refer to a long and distinct period in history, such as the Stone Age or the Industrial Revolution. Eras are often divided into smaller periods, such as the Bronze Age or the Renaissance. Eras are also used to refer to shorter periods of time, such as the Jazz Age or the Digital Age.