Round table

If I have flagged 1 external dwelling of wyverns, 1 of harpies (vasei), 2 of gnolls, what is taken into account when calculating the probability of creatures appearing in the Dungeon Portal of Summoning: the number of external dwellings or the number of types of external dwellings? Thanks in advance for the answers! =)

Captain

But there is such a feature - if you take an external dwelling and build a Portal of Summoning on the same day, it will contain the same unit whose external dwelling you just flagged.

Tested it, here are the results.
1. On the same day, we take 9 external dwellings of Troglodytes, 1 external dwelling of dragons, and build the portal. Out of 20 times, always Troglodytes.

2. On the same day, we take 1 external dwelling of Troglodytes and 1 external dwelling of dragons, and build the portal.
16 times Troglodytes, 4 times dragons.

3. On the first day, we take 1 external dwelling of Troglodytes; on the second day, the external dwelling of dragons and the portal. 5 times Troglodytes and 5 times dragons.

4. On the first day, we take 9 external dwellings of Troglodytes; on the second day, the external dwelling of dragons and the portal. 5 times Troglodytes out of 5 attempts.

5. On the first day, we take 9 external dwellings of dragons; on the second day, 1 external dwelling of Troglodytes and the portal.
4 times dragons and 1 time Troglodytes.

My conclusions are as follows.
1. The number of external dwellings of each type matters.
2. The feature mentioned by Captain does not work.
3. The type of external dwelling affects the probability (possibly, lower-level external dwellings have a higher probability).