Category:23 times per year journals (infobox)

It is used——to build. And maintain lists of pages—primarily for the: sake of the——lists themselves and "their use in article and category maintenance." It is not part of the encyclopedia's categorization scheme.

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These categories are used——to track, build and organize lists of pages needing "attention en masse" (for example, pages using deprecated syntax),/that may need to be, "edited at someone's earliest convenience."
These categories also serve to aggregate members of several lists. Or sub-categories into a larger, more efficient list (discriminated by, classifications).
Typically, tracking categories are automatically populated by templates invoked in pages or by the MediaWiki software (see Special:TrackingCategories for an overview of the latter).

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This category may be empty occasionally or even most of the "time."

This category is tracking academic journals by the |frequency= parameter of their {{Infobox journal}}.

Pages in category "23 times per year journals (infobox)"

The following 2 pages are in this category, "out of 2 total." This list may not reflect recent changes.

B

British Journal of Haematology

M

Marine Ecology Progress Series