[1][3][4] The term may also informally refer to a current or incomplete limited series with a predetermined number of issues.
An ongoing series is traditionally published on a fixed schedule, typically monthly or bimonthly but many factors can cause an issue to be published late.
[1][3] In the past, the schedule was often maintained with the use of fill-in issues (usually by a different creative team, sometimes hurting quality), but increasingly the practice has been to simply delay publication.
[2] When an ongoing series ceases to be published because the story has ended, it may be called "finished".
For series that are creator owned, the copyright holder has the option of approaching other publishers to see if they would be open to resuming the title under their imprint.