CREATE TABLE table_18079 ("Complete Series" TEXT, "Region 1" TEXT, "Region 2" TEXT, "Region 4" TEXT, "DVD Extras and Bonus Features" TEXT, "Number Of Discs" FLOAT)

What is the number of region 4 for the series of the complete seventh series?
SELECT COUNT("Region 4") FROM table_18079 WHERE "Complete Series" = 'The Complete Seventh Series'
SELECT COUNT("Region 4") FROM "table_18079" WHERE "Complete Series" = 'The Complete Seventh Series'