intermittently

• A few random orange blossoms scattered across the silk intermittently, as if blown by gusts of wind. —  EmbracetheNight
• Saxon Graff, English Cunningham had to pick up his physiognomy from the distance, intermittently, as they could. —  History of Friedrich II of Prussia
• Even though the strokes of genius would manifest intermittently, all such individuals would receive the permanent rating as geniuses. —  Prodigal genius - Tesla Biography
• He beat against the hull intermittently, asking about lungs Can escape with submarine lung," Monk replied, "if you clear hatch Doc crawled to the hatch. —  146 - Cargo Unknown
• He returned to his lodgings only intermittently, therefore, since he was often ‘on the road’. —  No Winding Sheet-Gladys Mitchell-Bradley 65

Roget's II: The New Thesaurus