Why brig-rigged frigates remained rare experiments

Did navies ever build brig-rigged frigates?

Rarely and experimentally; the arrangement was not considered successful enough to become normal frigate practice.

The viewer asks whether a game's large vessel could be understood as a brig-rigged frigate rather than a true brig. The arrangement did exist, but only rarely. One recalled experimental example was not judged viable enough to continue. Frigates were normally fully ship-rigged, so an exceptional sail plan should not be used to make a 36-gun brig seem routine.