If the process has a normal distribution, 99.7% of the population is captured by the curve at three standard deviations from the mean. Stated another way, there is only a 1-99.7%, or 0.3% chance of finding a value beyond 3 standard deviations.
Relish is one of them. The most traditional corn relish traces its origins to the South, particularly Louisiana. This sort of relish is often little more than fresh corn kernels, hot peppers, and spices that are boiled briefly in vinegar. The vinegar acts as a preserving agent and also pickles the corn.
My favorite topping, next to mustard of course, was sweet relish, which I would pile on with gusto. I do believe the reason they wrap hot dogs in paper at ball games is to catch the relish, so you can still eat it, and not waste a morsel.