Both the Battlemaster Fighter and Mastermind Rogue get an ability that gives the player the chance to learn information about an enemy if they study it for one minute. Since the two abilities don't cover the same information, can a player use both skills during the same one minute study or do they have to study separately in order to use both class abilities?

Battlemaster: Starting at 7th level, if you spend at least 1 minute observing or interacting with another creature outside combat, you can learn certain information about its capabilities compared to your own.

Mastermind: Starting at 9th level, if you spend at least 1 minute observing or interacting with another creature outside combat, you can learn certain information about its capabilities compared to your own.

I would say, yes, the same minute counts, since its any duration longer one minute or more where you aren't fighting it. Plus at this point you would be a 16th level character.

Thanks, that's what I thought. It's not a super powerful combination since it takes so long to come online, but could be useful in the right campaign.