CREATE TABLE table_4398 ("Heat Rank" FLOAT, "Lane" FLOAT, "Swimmer" TEXT, "Country" TEXT, "Time" FLOAT, "Overall Rank" TEXT)

Tell me the total number of time for heat rank of 1
SELECT COUNT("Time") FROM table_4398 WHERE "Heat Rank" = '1'
SELECT COUNT("Time") FROM "table_4398" WHERE "Heat Rank" = '1'