CREATE TABLE table_16588 ("#" FLOAT, "Episode" TEXT, "Air Date" TEXT, "Timeslot  ( EST ) " TEXT, "Season" TEXT, "Rating" TEXT, "Share" FLOAT, "18\\u201349" TEXT, "Viewers  ( m ) " TEXT, "Rank  ( # ) " TEXT)

What is the number of rank with the viewership of 5.96 million?
SELECT COUNT("Rank (#)") FROM table_16588 WHERE "Viewers (m)" = '5.96'
SELECT COUNT("Rank (#)") FROM "table_16588" WHERE "Viewers (m)" = '5.96'