Realtime search is still an emerging concept.

At this point, using a realtime search engine will bring you results by timedate. This doesnt always cater to relevancy, which is why there is still a lot of work to be done in this field. So, if realtime results are based upon timedate, and the users query, it stands to reason that time and those queries are the most important components in getting your content found in these types of searches. 1.