For both canned or frozen chickpeas, just give them a rinse in a colander with cool water and then add them to your recipes.
Rinsing canned chickpeas well will remove a significant amount of sodium and help to remove the thick fluid which contains oligosaccharides (these are sugars that are the gas-forming culprits!). Frozen chickpeas are already low in sodium and rinsing will help to defrost them.
Canned chickpeas keep well stored in a dry, cool place and can be stored for several years.
After chickpeas have been cooked, drained and rinsed, they can be frozen in an airtight container for up to 6 months.