intermittent

But I suspect that Johnson appreciates the gulf between the glamorous idea of working in the arts and the bitter reality of intermittent paychecks.

But even intermittent use, or unwitting use through contamination, poses a high risk of death.

"We're aware that some customers are experiencing intermittent issues with their services," they said.

To go back through Makenga's life so far is to look into decades of warfare, intermittent foreign intervention and the persistent lure of DR Congo's rich mineral resources.

There, the system is used to store intermittent energy by pumping water uphill during the day, when solar power is plentiful, and letting water run downhill to generate power at night.