A more efficient way would be to operate intermittently, he said.

The 1857 cable only operated intermittently for a few days or weeks before it failed.

One is the state estimator program, which operated only intermittently that day.

Afterwards the mines operated intermittently while most of the residents moved away.

A post office operated intermittently from 1861 to 1979.

In its last years the plant was operated intermittently.

During the last season of operation in the summer of 2004, the park operated intermittently.

If the connection is not made sufficiently, the power head doesn't operate or operates intermittently.

The mine was fully operational only until 1900 and thereafter operated intermittently.

Logging camps would operate in the vicinity intermittently from 1918 until 1935.