The upgrade time does not depend on the specific upgrade being bought, but only the level of the building. So, if you are upgrading the Counting House from level 0 (unupgraded, just built) to level 1, it will take ____. If you are upgrading the Counting House from level 19 to level 20, it will take ____. Groups:
| Graph IRI | Count |
|---|---|
| http://dbkwik.webdatacommons.org | 15 |