Hans disappears periodically, telling Claudine that he's going home to Germany for a few weeks.

Po-no-pha of the three clans disappeared periodically into the foliage to hunt, observed with envy by the twins.

The former disappeared periodically into alien and uncharted territory, which she had no wish - or perhaps felt she had no right - to question or explore.

His bisexual father periodically disappeared and returned.

However, a series of personal problems that have never been fully publicised led to him periodically disappearing from Celtic Park.

He would disappear periodically from his public ministry to seek treatment, often missing events and suffering from financial difficulties.

He used to disappear periodically and come back covered in glory and bruises, often taking us ashore to celebrate England's victory on the field.

The inner part of the disk of gas and dust circling the black hole seemed to disappear periodically.

Storm erosion has become a problem, and Main Beach periodically disappears, but creamy river sand is always reapplied like lipstick.