Запрос

            <?php
            $terms = get_terms(
              array(
                'taxonomy'   => 'data',
                'hide_empty' => true,
                'orderby' => 'count',
                'order' => 'DESC',
              )
            );

            if ( ! empty( $terms ) && is_array( $terms ) ) {
              echo '<div class="row">';
              foreach ( $terms as $term ) { ?>
                <div class="col-xl-2 col-6">
                  <a class="btn btn-outline-dark w-100" href="<?php echo esc_url( get_term_link( $term ) ) ?>">
                    <?php echo $term->name; ?>
                  </a>
                </div>
                <?php
              }
              echo '</div>';
            }
            ?>