Check out the listing date, this will help you to arrive at the Days on Marktet, if it is not stated on the listing. MlS does state the Days On Market, (DOM). Here is something tricky.
There is an Orignal date of a listing. There is also a Combined Days On Market.
Do check it out with a Realtor. You could relate these figures to the Property History. All of these terms have significance. Your best friend to walk you through, no doubt will be your friendly neighbourhoood Realtor. GuruToor.RE@gmail.com