youdao

Japan, which lies at the intersection of several tectonic plates, is regularly rattled by tremors of varying strength, with volcanic eruptions not infrequent.

日本位于几个地质板块的交界处，经常受到不同等级的地震的侵袭，偶然也会有火山爆发。

youdao

When the death of a loved one is sudden or unexpected, with lit-tle time to prepare, it is not infrequent for mourners to believe the dead person is still alive.

当至爱的人死得突然或者死于意外时，因为没时间准备，所以对于哀悼者来说，相信死去的人仍然活着是很常见的。

youdao

The two countries have not had formal relations since Iran's 1979 Islamic revolution and interaction between the two countries' diplomats has been infrequent.

VOA: standard.2009.06.24

It's not infrequent that i'll get one or even two people raising their hand that they took Economics 252 from me.

有的时候会有一两个人,举起手说,他们上过我的经济学252号课

耶鲁公开课 - 金融市场课程节选

Real interest rates as high as 50% on many consumer loans, says Richard Hainsworth of RusRating, mean big profits despite the not infrequent defaults.

ECONOMIST: Russian banks

"These types of attacks are not infrequent and we have mitigation measures in place, " the official, who was not authorised to speak on the record, told the Associated Press and other US media.

BBC: The White House as seen on 17 March 2010

It's not just infrequent travelers who get burned, but sometimes road warriors who happen to switch programs and don't pay attention to the old program.

WSJ: Saving Frequent-Flier Miles From the Ax