Intermittent flashes of lightning illuminated the dark gloom of the forest.

Tom is doing intermittent fasting to lose weight.

The fluorescent light was faulty and flickered on and off intermittently.

Tom tried intermittent fasting, but died of complications soon after.

Tom tried intermittent fasting, but his job was too hectic to allow it.

There was intermittent sunshine this morning.

Sami was checking his phone intermittently.

Filby became pensive. “Clearly,” the Time Traveller proceeded, “any real body must have extension in four directions: it must have Length, Breadth, Thickness, and—Duration. But through a natural infirmity of the flesh, which I will explain to you in a moment, we incline to overlook this fact. There are really four dimensions, three which we call the three planes of Space, and a fourth, Time. There is, however, a tendency to draw an unreal distinction between the former three dimensions and the latter, because it happens that our consciousness moves intermittently in one direction along the latter from the beginning to the end of our lives.”

It's been intermittent for 2 or 3 months.