Do NOT freeze seeds unless you are 100% certain they are 100% completely dry.
If not, freezing will crack the seed and it won’t germinate. Keep them dry and in ziplocks or lidded Mason jars and they’ll be fine.
Rule of thumb: The LARGER the seed, the sooner it loses it’s viability. So, seeds for green beans, pumpkins, summer or winter squash and sweet corn should be replaced every few years. You’ll STILL Get SOME germination, but not as much as with fresh seed.
Tiny seeds like lettuces and poppies can last quite a number of years.
And don’t buy those 10 for $1.00 seeds at Walgreen’s, other than for ‘weedy’ flowers like Bachelor Buttons and Cosmos. Their germination rates are terrible. ;)
If freezing damp seeds cracks them, how do seeds “in the wild” get dry before winter hits?