An average renter searches for an apartment between two weeks to three months (14 to 90 days) before they move.
Most search one to two months before they move. -See graph below
Renters want to make informed decisions and will make the time to do so. Remember, they are looking at your property plus your competition.
-info & stats from Online Search Behavior and Trends of Apartment Renters | A Joint Study by Apartments.com and Google