I would suggest you just re-post it in oils / technical and not worry about this one. If a mod decides to delete it they can.
I have never put my brushes in the freezer but I have done that with my paints. A freezer does slow drying time quite a bit, but not for as long as putting the palette underwater. In a normal household freezer it is not going to get cold enough to harm your oils or your brushes. Put them in an air tight container so as not to contaminate your freezer.
If I don't want to clean my brushes yet, most of the time I will wipe the paint off then dip them in pure walnut oil and place them in my horizontal brush rest. They will stay wet like that for at least 5 days. Wipe the walnut oil off when you are ready to paint again.
You might find something you can use on this thread of mine when it comes to keeping your palette fresh. I have tried clove oil in a palette box, the freezer with clove oil in the box, and underwater. The last method worked the best. You can also put your brush tips under water to prevent the oils from drying on them, but be sure the water doesn't reach the wooden handles.