CREATE TABLE table_24574 ("Train No." CLOB, "Train Name" CLOB, "Destination" CLOB, "Category" CLOB, "Frequency" CLOB)

What is the frequency of trains numbered 12671/12672?
SELECT "Frequency" FROM table_24574 WHERE "Train No." = '12671/12672'
SELECT "Frequency" FROM "table_24574" WHERE "Train No." = '12671/12672'