CREATE TABLE table_56197 ("Outcome" TEXT, "Date" FLOAT, "Championship" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

On what Date was the Score of 3 6, 6 4, 3 6, 6 1, 6 2
SELECT SUM("Date") FROM table_56197 WHERE "Score" = '3–6, 6–4, 3–6, 6–1, 6–2'
SELECT SUM("Date") FROM "table_56197" WHERE "Score" = '3–6, 6–4, 3–6, 6–1, 6–2'