I were at the Bargemen t’other night, Pip;"—whenever he subsided into affection, he called me Pip, and whenever he relapsed into politeness he called me sir; "when there come up in his shay-cart, Pumblechook.
There are no more uses of "relapse" in the book.
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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.