CREATE TABLE table_30187 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" FLOAT)

How many dates did the episode with a production code of 804 originally air on?
SELECT COUNT("Original air date") FROM table_30187 WHERE "Production code" = '804'
SELECT COUNT("Original air date") FROM "table_30187" WHERE "Production code" = '804'