occasional

He has held occasional private dinners to gather Silicon Valley elite alongside gene-editing experts.

She has, however, still had to navigate the occasional tricky situation, such as when she was a presenter on the BBC's entertainment bulletin Liquid News.

With no human behind the wheel, it sailed smoothly through the streets of Beijing, dodging the occasional double parker or illegal turner.

In the past, presidential officials, staff and the occasional president brought her coffee and donuts.

But nothing substantial can happen while the Gaza ceasefire hangs by a thread, and Israel and Hamas still trade occasional blows.