CREATE TABLE table_28086 ("Episode Number" FLOAT, "Episode" TEXT, "Rating" TEXT, "Share" FLOAT, "Rating/Share  ( 18-49 ) " TEXT, "Viewers  ( millions ) " TEXT, "Rank  ( Timeslot ) " FLOAT, "Rank  ( Night ) " FLOAT)

How many episodes had rating/share (18-49) of 0.7/2 and a rating of 2.1?
SELECT COUNT("Episode Number") FROM table_28086 WHERE "Rating/Share (18-49)" = '0.7/2' AND "Rating" = '2.1'
SELECT COUNT("Episode Number") FROM "table_28086" WHERE "Rating" = '2.1' AND "Rating/Share (18-49)" = '0.7/2'