How many frontiers are there in the world?

The concept of "frontiers" can vary based on context, but generally, there are numerous frontiers in terms of geographical, political, cultural, and economic boundaries. In a political context, there are about 195 countries globally, each with its own frontiers defined by borders. Additionally, frontiers can refer to areas of exploration and development, such as technological or scientific frontiers. Therefore, the exact number of frontiers depends on the criteria used for classification.