Four Times in Three Months (слэш)

Stiles gets injured, on average, every three days. How does he know? Because Peter actually tracks it, determined they decrease that number to once a week. (And hey, it had been a two day average before they formed their pack last year, so Stiles is making progress, slow as it might be.)
Most of the time he doesn't end up in the ER, but when he does, it's generally a miserable experience.
Except when Peter stops by—then things don't seem miserable, at all.