CREATE TABLE table_name_52 (total_goals VARCHAR(255), league_goals VARCHAR(255), fa_cup_apps VARCHAR(255), position VARCHAR(255))
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