circulation; number of copies printed
Refers to the total number of copies printed for a publication, such as a book, magazine, or newspaper. Often used in publishing and media contexts.
The circulation of this magazine is about 100,000 copies per issue.
Because the number of copies printed was small, this book quickly went out of stock.
出版部数 refers to the number of copies published, a narrower usage than the general 部数.
Compound of 出版 (shuppan, 'publishing') and 部数 (busū, 'number of copies').