Without allowing himself even to think of what was to come, of how it would end, judging from his inquiries as to the usual duration of these ordeals, Levin had in his imagination braced himself to bear up and to keep a tight rein on his feelings for five hours, and it had seemed to him he could do this.
There are no more uses of "duration" in the book.
Show samples from other sources
I take zinc tablets to help shorten the duration of a cold.
More frequent and longer duration exercise is associated with better health.