CREATE TABLE table_17655 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Total viewers  ( in millions ) " TEXT)

What is the total number of titles written by Casey Johnson?
SELECT COUNT("Title") FROM table_17655 WHERE "Written by" = 'Casey Johnson'
SELECT COUNT("Title") FROM "table_17655" WHERE "Written by" = 'Casey Johnson'