What is the total Frequency MHz Port Charlotte, Florida, which has an ERP W larger than 10, has?
CREATE TABLE "translators" (
  "call_sign" text,
  "frequency_m_hz" real,
  "city_of_license" text,
  "erp_w" real,
  "class" text,
  "fcc_info" text
);
SELECT COUNT("frequency_m_hz") FROM "translators" WHERE "city_of_license"='port charlotte, florida' AND "erp_w">10;