CREATE TABLE table_66821 ("Call sign" TEXT, "Frequency MHz" FLOAT, "City of license" TEXT, "ERP W" FLOAT, "FCC info" TEXT)

Name the total number of ERP W when the call sign is w217bf
SELECT COUNT("ERP W") FROM table_66821 WHERE "Call sign" = 'w217bf'
SELECT COUNT("ERP W") FROM "table_66821" WHERE "Call sign" = 'w217bf'