CREATE TABLE table_30947 ("Episode" FLOAT, "Broadcast date" TEXT, "Guest ( s ) " TEXT, "Singer ( s ) " TEXT, "Comedian" TEXT, "Ratings" TEXT)

Name the number of ratings for bruce forsyth
SELECT COUNT("Ratings") FROM table_30947 WHERE "Guest(s)" = 'Bruce Forsyth'
SELECT COUNT("Ratings") FROM "table_30947" WHERE "Guest(s)" = 'Bruce Forsyth'