CREATE TABLE table_72786 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Crowd" FLOAT, "Date" TEXT)

On what date did the away team Fremantle play?
SELECT "Date" FROM table_72786 WHERE "Away team" = 'Fremantle'
SELECT "Date" FROM "table_72786" WHERE "Away team" = 'Fremantle'