Winterization is an idea popularized after Rick Simpson published his oil making procedure. Winterization has long been a step in the industrial process of manufacturing cooking oil. The theory being plant waxes crystallize at cold temperatures into a visible mass that can then be removed through gravity, vacuum or centrifugal force filtering.
The freezing and crystallization happens over time in a cold motionless environment. Home freezers run at -20c/0f, sufficient for this to occur. Historically, Winterization has taken 12-24 hours to cool and precipitate the waxes. But that is with a full volume of alcohol, from quarts to gallons. What happens when its only a quarter cup of Ethanol? Time scales in the opposite direction. This small amount of alcohol needs very little time to reach -20c/-4f, the coldest temp in your freezer. If you have some Dry Ice left over from step one, you can speed up the freeze even more.
There is another benefit to moving Winterization after Distillation. By first Silting, then distilling in salt water, virtually all the polar and semi-polar compounds have been removed from the oil, leaving a majority of non-polar lipids, IE, fats oils and waxes in the form of resins. 95% Ethanol and heat will be needed to melt this resin. Lower proof Ethanol has higher water content thus makes it harder to dissolve the resin. Again, polarity is playing a role in this. Water is the most polar solvent on the planet, truly the polar opposite of the non-polar resin. 95% Ethanol struggles to dissolve this resin at room temperature. Add some heat and the resins give way to the dissolving powers of alcohol, but not the water. In this mixture, you can see the resins actually pooling and flowing like wine veins on the sides of a wine goblet. This is polar forces at work causing separation between the dissolved oils and water. Freezing this viscous fluid takes very little time. Waxes crystallize faster in this small volume of alcohol.
Once the waxes have solidified and are a visible mass, pour this bowl into a paper napkin filter. This allows the dissolved oils to flow through, but catches the waxes and other particulates. A true paper coffee filter is too thick and needs vacuum assist to draw out the fluid. All this should be performed at freezing temperature.
After the waxes have been collected in the paper napkin, save the napkin to harvest the waxes for other uses. Your bowl of dissolved oils is ready for final reduction.