CREATE TABLE table_64716 ("Rank" FLOAT, "Athlete" TEXT, "Country" TEXT, "Time" TEXT, "Notes" TEXT)

What rank did the time of 7:31.90 receive?
SELECT COUNT("Rank") FROM table_64716 WHERE "Time" = '7:31.90'
SELECT COUNT("Rank") FROM "table_64716" WHERE "Time" = '7:31.90'