Volume and chapter counts are only added when the work is completed or confirmed complete. if the work is still publishing, both remain at zero.
One-Shots should have the chapter count as one and the volume count left as zero.
The total number of chapters in the original serialization of the work. This does include things such as ‘side’ chapters (Example: Chapter 5.5), bonus chapters and some prologues and epilogues.
This does not exclude special pages for things such as advertising volume releases or author comments.
The total number of volumes in the original print or eBook run of the work.