You say that you pour the 1 cup of Everclear into the cannabis and then let it sit for 3 or 4 days minimum. I have a friend that puts the jar in the freezer for one hour and then strains it into a dish. Do you know of this method and what is your knowledge on it? Is it less effective than letting the tincture sit for 3 - 4 days?
When it comes to cannabis tincture soak time, it all depends on what you intend to use the tincture for. In the cooking course, I assume people are going to use it when making edibles. Or perhaps they will use it sublingually, meaning placed under the tongue. This is a great method of ingestion for tinctures that is almost, but not quite, as fast as smoking or vaping, which is a topic for another video.
If, however, I planned to turn my alcohol tincture into a cannabis concentrate for smoking, vaping, or dabbing, I would do definitely do what your friend did and do a quick wash and use the freezer. In fact, I would even use dry ice if this was the intended purpose. I would then filter the tincture multiple times. This is the method I use when I make concentrates using The Source by Extractcraft. That’s because when you are making such concentrates, you want it as pure as can be with as little extra other compounds in there as possible.
However, for cooking and for tinctures I let it go far longer because I don't need the purity of a tasty dab hit. I want to get as many cannabinoids and terpenes as possible for their medicinal benefits. Hence the longer infusion time. Sometimes I even let my edibles tinctures infuse longer.
I hope this helps clear up any confusion.