I'm trying to translate somebody's tweet, and I'm just blocking on this one bit. I understand every part ("単行本", "第三巻", "予定", "から"), except the "分", of course. I know what the kanji "分" means individually, but I'm not sure what it's supposed to designate in this sentence.
Here is the full sentence:
I can't quite get if it's supposed to mean basically "part of 単行本", or I've went as far as to exaggerate the translation and say "chapter" for it, because of "第二" and "第三". Maybe that's just a problem of sentence structure, and what part/word 分 is connected to, or maybe that's just an expression with から or 予定 (which in that case I'm not seeing, despite checking in dictionaries), in any case, I'm just really blocked on this one kanji and its meaning in the phrase.