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 use of ‘original’ below is due to the fact that series can have new editions printed, omnibus volumes if licensed, etc. These can have different counts than the original runs.
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.
The lengths for the 'Ten' manga.