Given how infrequently new copies of the map appeared on the market, collectors would bid handsomely for the artifact.
Not infrequently, they have believed that the drugs were of benefit to them.
If I remember correctly they themselves tend to resort to sanctions as a policy tool not infrequently.
These are customers who want a high that includes hallucinations and, not infrequently, a psychotic episode.
I have been back in the US for almost 25 years now, and have returned to Israel infrequently.
Whatever the source of the poison may be, it is quite powerful, and death not infrequently results.
Not infrequently a body is found after an explosion has loosened the wreckage.
Vicious companions not infrequently sow the seeds of evil habits far and wide, contaminating all who come within their influence.
We breed slowly, infrequently—you might even say, thoughtfully.
Not infrequently the thought of one division differs considerably from the thought of the next.