Table schema:
CREATE TABLE table_name_52 (total_goals VARCHAR, league_goals VARCHAR, fa_cup_apps VARCHAR, position VARCHAR)

Question: how many times is the fa cup apps more than 0, the position mf and the league goals 4?
SQL: SELECT COUNT(total_goals) FROM table_name_52 WHERE fa_cup_apps > 0 AND position = "mf" AND league_goals = 4