Plaguescarred
Hero
Whle i agree not all task can necessarily be de done repeatedly, i know we're given little insight RAW on how to handle there;
PHB175 Passive Checks:...Such a check can represent the average result for a task done repeatedly, such as searching for secret doors over and over again, or can be used when the DM wants to secretly determine whether the characters succeed at something without rolling dice, such as noticing a hidden monster.