How to use "briefly" in a sentence

Fellow citizens of the United States: in compliance with a custom as old as the government itself, I appear before you to address you briefly and to take, in your presence, the oath prescribed by the Constitution of the United States, to be taken by the President "before he enters on the execution of his office."

But before she realized what was happening, their lips met softly, briefly

For a few seconds they paused, touching each other briefly, gathering their courage.

He was briefly immobilized, dazed by his own ability to strike so fast and so violently