not uncommon

Happens quite often

Not uncommon is a deliberate understatement meaning fairly common or frequent.

The double negative softens what might sound too definitive: It's not uncommon for flights to be delayed hedges more than saying delays are common.

The construction appears often in formal or academic writing, sometimes criticized as needlessly indirect.

Related

quite often · understated · regular · prevalent · ordinary · occasional · normal · usual · periodic · litotes · double negative · figure of speech · recurrent · rarely · intermittent · conventional · happening · implied

Opposites
frequency of occurrence

not uncommonrare

Seldom found or seen

uncommon · unusual · infrequent · exceptional · scarce

rhetorical force

not uncommonunheard of

Without prior instance

never · rare · nonexistent · almost never

Family

common, uncommon, commonly, commons, commonness, commonality, commoner, commonplace, knot

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G