The term 'Divisions of Time' can refer to a variety of different concepts, such as the geological ERAS, which are divided into periods and epochs. The four-letter crossword solution for this term is 'ERAS'. An era is a period of time in history or prehistory, usually lasting millions of years, that is defined by some major event or change in the Earth's environment. ERAS are typically divided into smaller units of time, such as periods and epochs.