SELECT "competition" FROM table_203_652 GROUP BY "competition" ORDER BY COUNT(*) LIMIT 1
what type of competition was played the least ?
CREATE TABLE table_203_652 (
    id number,
    "goal" number,
    "date" text,
    "venue" text,
    "opponent" text,
    "score" text,
    "result" text,
    "competition" text
)