question: What is the total Frequency MHz Port Charlotte, Florida, which has an ERP W larger than 10, has?
answer: SELECT COUNT(frequency_mhz) FROM table_name_41 WHERE city_of_license = "port charlotte, florida" AND erp_w > 10
context: CREATE TABLE table_name_41 (frequency_mhz VARCHAR, city_of_license VARCHAR, erp_w VARCHAR)