Recidivism is a falling back into an undesirable activity, especially crime, after one has temporarily stopped doing so.
Something that is incidental is a minor occurrence related to something more important or something that happens by chance.
When two things coincide, they go along with each other, match, or happen at the same time—they all fall together in one way or another.
An incident is something that occurs or happens at a given time and is usually something unpleasant.
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