CREATE TABLE table_21018 ("Model number" TEXT, "sSpec number" TEXT, "Frequency" TEXT, "L2 cache" TEXT, "FSB" TEXT, "Mult." TEXT, "Voltage" TEXT, "TDP" TEXT, "Socket" TEXT, "Release date" TEXT, "Part number ( s ) " TEXT, "Release price  (  USD  ) " TEXT)

Name the frequency for part number of ac80566ue041dw
SELECT "Frequency" FROM table_21018 WHERE "Part number(s)" = 'AC80566UE041DW'
SELECT "Frequency" FROM "table_21018" WHERE "Part number(s)" = 'AC80566UE041DW'