He seems to disappear into himself for days and weeks at a time.

Occasionally, too, he would disappear after class for several days running.

The house was so called because that is where the sun disappeared for several days, leaving the people in total darkness.

After his arrival he often disappeared for days at a time.

Every once in a while he disappears for days on end.

She often disappeared on her own for days at a time.

The condition may come and go, disappearing for days or even months.

The father began to drink and would sometimes disappear for days.

Though her husband isn't certain, he has been led to believe that his mother would disappear for days at a time.

On the other hand, he said, young adults often disappear for days at a time.