CREATE TABLE table_9088 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" FLOAT, "Time" TEXT, "Location" TEXT)

How many rounds was the fight when the record was 4-0?
SELECT COUNT("Round") FROM table_9088 WHERE "Record" = '4-0'
SELECT COUNT("Round") FROM "table_9088" WHERE "Record" = '4-0'