The term 'A VERY, VERY LONG TIME' can be summarized by the crossword solution 'AEON', which is a four-letter word. An AEON is an indefinite and very long period of time, often used to refer to a period of time that is so long it cannot be measured. It is commonly used in religious contexts to refer to an age or eternity. In Greek mythology, an AEON is a god or goddess who presides over a realm of existence.