Mrs. Morland watched the progress of this relapse; and seeing, in her daughter’s absent and dissatisfied look, the full proof of that repining spirit to which she had now begun to attribute her want of cheerfulness, hastily left the room to fetch the book in question, anxious to lose no time in attacking so dreadful a malady.
There are no more uses of "relapse" in the book.
Show samples from other sources
She returned to the hospital due to difficulty breathing after a relapse of the flu.
She stayed clean for over a year, but had a relapse in December and is now in a drug treatment center.