…air of oblivion among them was highly important from whatever it sprung; and in the event of Admiral Croft’s really taking Kellynch Hall, she rejoiced anew over the conviction which had always been most grateful to her, of the past being known to those three only among her connexions, by whom no syllable, she believed, would ever be whispered, and in the trust that among his, the brother only with whom he had been residing, had received any information of their short-lived engagement.
There are no more uses of "short-lived" in the book.
Show samples from other sources
He knew that meant their mutiny had been short-lived, all three of them subdued in less than a minute.
James Dashner -- The Death Cure
Then, remembering my responsibilities to my scientific supplies, I entered the cabin, barred the door, and regardless of the discomfort caused by the stench of the debris on the floor made myself as comfortable as I could on top of the table for the balance of the short-lived night.