It's more like every three weeks, Shel. If you don't shop they become like National Geo, and you need a separate house just for the coupons.
I also save their $5 coupons, which are available through various venues. First you apply as many 20% coupons as works for those purchases. And then the $5 coupons come off the bottom. On my last shopping trip the savings worked out to something like 35%.
BTW, Linen & Things accepts all BB&B coupons. And there's no limit to how many you can use (BB&B "officially" limits you to five. But, then again, the BB&B coupons "officially" have expiration dates---yeah, right!)