When instructed to count multiple piece types separated by slashes (e.g., "the fewest Towns/Cities"), do players choose which piece type to count?

When instructed to count multiple piece types separated by slashes (e.g., "the fewest Towns/Cities"), do players choose which piece type to count?

No. Count all pieces that are at least one of the types on the list. So in the example, if there are 2 Towns and 1 City in the land, the total for that land is 3 Towns/Cities. In the unlikely case that a piece is on the list multiple ways, it only gets counted once.