Bacteria is usually what causes odors on clothes that won't go away when washing them so if you have clothes that odor lingers on and you've washed them and the odor is still there then there's likely a bacteria on the clothes causing the odor.
When you freeze the clothing the freezing temperatures of the freezer will kill off the bacteria since the bacteria cannot survive in freezing temperatures.
Put your clothes inside a Ziploc bag and then place them in the freezer overnight and the bacteria will be killed and the odor should go away.
You might also need to wash the clothes again but then the odor should be fully gone because the bacteria will be killed.