Rockbot's music curators are updating our playlists every 2-4 weeks. However, new music comes out daily and weekly.
To ensure you have the newest music all the time, we recommend adding one (or all) of our NEW playlists to your station (related article: Video: Adding a Playlist to Your Station). These playlists are updated weekly as new music is released.
The quickest way to locate them is to search the keywords "New Releases". (You may need to scroll down to locate all of them.)