CREATE TABLE table_name_54 (frequency_mhz VARCHAR, erp_w VARCHAR, class VARCHAR, call_sign VARCHAR)

Name the total number of frequency Mhz with class of d and call sign of k201bm and ERP W less than 74
SELECT COUNT(frequency_mhz) FROM table_name_54 WHERE class = "d" AND call_sign = "k201bm" AND erp_w < 74
SELECT COUNT("frequency_mhz") FROM "table_name_54" WHERE "call_sign" = "k201bm" AND "class" = "d" AND "erp_w" < 74