occasionally

Mr Devenport added that he was “occasionally a rival who did me professional damage, but on a personal level we were always very good friends”.

But he is yet to prove he can put in this sort of performance other than very occasionally.

You may never have heard of this single-celled alga, but sailors and fishermen know its effect very well: the P. lunula algae are the organisms that occasionally make the see glow blue.

They serve their superiors reliably yet sometimes secretly, occasionally contravening their superiors' domestic interests by distorting what they tell them about bargains being struck with adversaries to hold off blood-dimmed tides.

The Martha Stewart Living founder, who appears peeved occasionally throughout the documentary, told Fallon she didn’t enjoy the process of making the film.