• Google’s guide now sets expectations for how long clustered pages take to re-evaluate after a content fix.
• Pages generally leave a duplicate cluster faster when the content difference between them is clear.
• Request Indexing can ask Google to re-evaluate clustered pages, though Google advises saving it for your most important URLs.

Google updated its canonicalization troubleshooting guide with new guidance on how long pages can stay in a duplicate cluster after you fix the content.