Use 'rapidity' when describing something that happens very quickly, especially changes or actions. The rapidity with which the team adapted to new strategies was impressive.
Pro Tip 2/3
Emphasis on Speed
'Rapidity' emphasizes the remarkable speed of an event or action, often exceeding normal expectations. She finished the exam with rapidity, leaving the room first.
Pro Tip 3/3
Contextual Variety
'Rapidity' can be applied in various contexts, from physical movements to intellectual processes. The scientist was praised for the rapidity of his mental calculations.