This is certainly a big issue for all of the real estate websites that pull in the MLS listings, since those are essentially duplicates of each other. It creates a lot of duplicate content.
There are a few things to keep in mind:
- The first crawled is considered the originator of the content--so you'll want to get those pages crawled as soon as possible or frequently.
- Pages that get crawled quickly tend to have more Domain Authority (you get DA from other sites, through links)- Links to pages typically help rankings, as well as social media mentions, as well.
So, in order to get your site crawled quickly or frequently, you'll need to get your Domain Authority to be higher than your competitors' sites. Also, new pages need to have links. So, if you can get those pages (new MLS listings) some links quickly then that will help, as well.