Chiming in from theoretical linguistics: it is impossible for natural languages to "count", i.e. make reference to numbers other than 0, 1 or infinity.

As an example, there are languages where prenominal genitives are impossible (0).

Then, there are languages, such as German, where only one prenominal genitive is possible (1):

> Annas Haus

> *Annas Hunds Haus

Finally, there are languages, such as English, where an infinite number of prenominal genitives are possible (infinity).

> Anna's house

> Anna's dog's house

> Anna's mother's dog's house

> Anna's mother's sister's ... dog's house

But there are no languages where only two or three prenominal genitives are possible.

This property is taken to be part of Universal Grammar, i.e. the genetic/biological/mental system that makes human language possible.