From the help file, topic Medley Maker:
You can have multiple choruses, so if you had 3 choruses of a 250 bar medley, it would last 750 bars.


Desktop; i7-2600k, 8 GB mem., Win 10 Pro, BIAB 2017; RB 2017 - latest build
Laptop: i5-2410M, 4 GB mem, Win 10 Pro, BIAB 2017; RB 2017 - latest build