rapidity

I just kind of knew it based on the rapidity of the infections.

It will be remembered that pitch depends upon the rapidity of the sound waves or vibrations.

The fingers of all the clocks in the house were revolving with the most extraordinary rapidity--she was helpless.

Rapidity of action and a self-confidence which on the battlefield never felt itself beaten were the cause of Murat's success.

Spite, however, of punishments and prohibitions the use of tobacco spread with the rapidity of lightning.

There chanced to be a forked tree close at hand, to which the major rushed and scrambled up with amazing rapidity.