"Popularity" metric #30
Description
Some ratio of number of times worn per day (from first entry?), maybe some additional weighting to the most recent weeks.
Factors:
- How long had watch, measured by first day worn
- Wears per day owned
- Wears in the last 14 days
Store all of those in the struct and update them when the watch gets updated? Or update them every time wd gets run, since they are tied to days? Or maybe not, just calculate them and present on an ls.