The Recurring scripts executes on each and every setup:upgrade command, regardless of the schema_version or data_version logged against the setup_module table.

Let's create the <MAGELICIOUS_DIR>/Core/Setup/Recurring.php file with the following content:

use MagentoFrameworkSetupInstallSchemaInterface;
use MagentoFrameworkSetupModuleContextInterface;
use MagentoFrameworkSetupSchemaSetupInterface;

class Recurring implements InstallSchemaInterface {
    public function install(SchemaSetupInterface $setup, ModuleContextInterface $context) {
        $setup->startSetup();
        echo 'Recurring->install()' . PHP_EOL;
        $setup->endSetup();
    }
}

Though interesting, the Recurring scripts are rarely used in Magento. Only a handful of them are used, and that is mostly for installing external foreign keys. This is not to say that we cannot use them for our purposes – it is just that their use case is quite limited when we think about it.