How many supporting articles are needed to build topical authority?

A cluster of 8 to 12 tightly focused, interlinked articles is usually enough to achieve topical authority in a specific niche.

Topical Authority & Content Clusters: How to Outrank Giant High-DA Websites | LaunchGremlin

Why publishing 10 interlinked articles around a single topic beats writing 10 random blog posts. How search engines evaluate topical depth.