CREATE TABLE table_30966 ("Episode" FLOAT, "Broadcast date" CLOB, "Guest ( s ) " CLOB, "Singer ( s ) " CLOB, "Ratings" CLOB)

how many broadcaste dates features the overtones
SELECT COUNT("Broadcast date") FROM table_30966 WHERE "Singer(s)" = 'The Overtones'
SELECT COUNT("Broadcast date") FROM "table_30966" WHERE "Singer(s)" = 'The Overtones'