The term 'set at intervals' can be defined as arranging something in a regular pattern with equal distances between each item. This term can be broken down into two crossword solutions: SPACE (5 letters) and SPACED (6 letters). The word SPACE is an adjective that means to arrange or distribute items with equal distances between them. The word SPACED is a verb that means to arrange or distribute items with equal distances between them. Both words are used to describe the same action of setting something at intervals.