Dodo Tracker is a tool for tracking, analyzing, and predicting villager encounter rates across the game Animal Crossing: New Horizons. We are able to calculate campsite visitor frequency for each villager by analyzing past visits as well as your current and past residents. As for mystery islands we only need to look at current island residents. For details on this check out drjay's doc on campsites and/or ctar17's doc on mystery islands.
By clicking (My Island Residents).
By clicking (Track Encounter).
By clicking (Browse Villagers) or (My Data).