Definition of "feverishly"

In the outer room the two women knitted black wool feverishly.

1899 February, Joseph Conrad, “The Heart of Darkness”, in Blackwood’s Edinburgh Magazine, volume CLXV, number M, New York, N.Y.: The Leonard Scott Publishing Company, […], part I

With nothing else to do, he carried the candle to the front room and began feverishly filling his pipe.

1938, Norman Lindsay, Age of Consent, 1st Australian edition, Sydney, N.S.W.: Ure Smith, published 1962, page 80