This is big data science-driven analysis and it is not instantaneous.  Although, you can get some immediate results using Visibility Explorer whilst you wait.  It does depend upon the size of the market;
For small markets under a few hundred thousand keywords it typically takes a few hours.
For the largest markets of several million keywords or more it can take up to 48 hours.
The largest market for a brand we have analysed automatically is ~5mn keywords.