I am not sure what visits_year means? Is the average number of visits to the station divided by the time the station has been active? Also, once you select that column, I am not sure what the "timeline" display means. Can you add some additional documentation?
Also - I don't think you should use a temporal domain that spans the entire range of 1990 to 2022. You need to adjust the time window based on when the station was put in service.
That is the initial state can be the beginning of the archive, but once a 4ChID is selected, the initial time needs to correspond to the first available data.