%hash = (
          'preparation' => {
                             'frequency' => 2,
                             'variants' => [
                                             'preparation'
                                           ]
                           },
          'conference' => {
                            'frequency' => 3,
                            'variants' => [
                                            'conference',
                                            'conferences'
                                          ]
                          },
          'well' => {
                      'frequency' => 1,
                      'variants' => [
                                      'well'
                                    ]
                    },
          'International' => {
                               'variants' => [
                                               'International'
                                             ],
                               'frequency' => 1
                             }
        );