CREATE TABLE table_203_741 (id NUMBER, "season" CLOB, "competition" CLOB, "round" CLOB, "opponent" CLOB, "home" CLOB, "away" CLOB, "aggregate" CLOB)

which opponent is listed the most on this chart ?
SELECT "opponent" FROM table_203_741 GROUP BY "opponent" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "opponent" FROM "table_203_741" GROUP BY "opponent" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY