CREATE TABLE table_name_30 (season VARCHAR(255), premier VARCHAR(255), score VARCHAR(255))
How many seasons feature essendon, and a Score of 15.12 (102) – 9.14 (68)?
    
SQL: SELECT COUNT(season) FROM table_name_30 WHERE premier = "essendon" AND score = "15.12 (102) – 9.14 (68)"