In basketball, a double-double is a single-game performance in which a player accumulates ten or more in two of the following five statistical categories: points, rebounds, assists, steals, and blocked shots. The first "double" in the term refers to the two categories and the second "double" refers to accumulating ten or more in that category. Similarly, a player records a triple-double, quadruple-double, and quintuple-double when accumulating ten or more in three, four, or all five of the statistical categories, respectively. While double-doubles and triple-doubles occur regularly each NBA season, only four quadruple-doubles have ever officially been recorded in the NBA, and no quintuple-double has ever been recorded in a professional basketball game. A similar term, the five-by-five, is the accumulation of at least five in all five statistical categories. It is rarely done.