CREATE TABLE table_8838 ("Model Number" TEXT, "Frequency" TEXT, "L2-Cache" TEXT, "Front Side Bus" TEXT, "Multiplier" TEXT, "Voltage" TEXT, "Socket" TEXT)

Which Frequency has a Model Number of c3 1.4a?
SELECT "Frequency" FROM table_8838 WHERE "Model Number" = 'c3 1.4a'
SELECT "Frequency" FROM "table_8838" WHERE "Model Number" = 'c3 1.4a'