Frequency is measured in hertz (Hz). A person who has hearing within the normal range can hear sounds that have frequencies between 20 and 20,000 Hz. The most important sounds we hear every day are in the 250 to 6,000 Hz range.
An issue date was added, and cheques may not be valid a certain amount of time after issue. In the US and Canada a cheque is typically valid for six months after the date of issue, after which it is a stale-dated cheque, but this depends on where the cheque is drawn; in Australia this is typically fifteen months.
1,722. Checks are usually considered stale-dated after 6 months from the date on the check, unless there is text on there that says something like Must be cashed within 90 days of issue. You can try taking it to your bank; they may cash it or they may tell you to get the check reissued.echo Signature here; 0.continuing my own thought) This is because a check is essentially my promise to reimburse you for $10. Further, I would prefer everyone would hold my checks for ten years. In the interim, inflation will make it worth less for the recipient than when I wrote the check, and will have earned interest for me to boot.