CREATE TABLE table_74140 ("#" FLOAT, "No." FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Viewers" FLOAT, "Original airdate" TEXT, "Prod. code" FLOAT)

what is the number of original airdate written by allan hawco?
SELECT COUNT("Original airdate") FROM table_74140 WHERE "Written by" = 'Allan Hawco'
SELECT COUNT("Original airdate") FROM "table_74140" WHERE "Written by" = 'Allan Hawco'