Notso
Official Terrarian
That is a block count and not an individual ore count. That's only telling you the total number of the selected item type and not the individual counts for separate ores. There is a difference.
I don't want to know that there are a total of 5 million ore blocks in the map . I want to know how many of each type of ore were generated.
Why do you assume from @Wrulfy 's description that you can't choose specific types of ore? Or have you tried it?