Name the total number of frequency Mhz for when it has ERP W of 1 and call sign of w215bj
CREATE TABLE "broadcast_translators_of_wise_fm" (
  "call_sign" text,
  "frequency_m_hz" real,
  "city_of_license" text,
  "erp_w" real,
  "fcc_info" text
);
SELECT COUNT("frequency_m_hz") FROM "broadcast_translators_of_wise_fm" WHERE "erp_w"=1 AND "call_sign"='w215bj';