Frantic is an adjective that means desperate or frenzied. The adverb is frantically.
They culminated a weekend of frantic around-the-clock negotiations, as Wall Street bankers huddled in meetings at the behest of Bush administration officials to try to avoid a downward spiral in the markets stemming from a crisis of confidence. (NY Times)
The broader point is that frantic price-lowering will likely continue as long as the economy remains weak and business travel continues to contract. (The Economist)