CREATE TABLE table_22928 ("\\u2116" FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( millions ) " TEXT)

For episode number 7, what was the numbers of original air dates?
SELECT COUNT("Original air date") FROM table_22928 WHERE "#" = '7'
SELECT COUNT("Original air date") FROM "table_22928" WHERE "#" = '7'