Examples from literature

• Ethan expected to hear the shambling step going away with a celerity proportionate to the importance of the errand. 
• Having collected all their forces, with loud whooping and encouraging shouts to one another, they led towards us with great celerity. 
• He poured his own drink and shoved the bottles toward his friend, who helped himself with skilful celerity. 
• The dog vanished with astonishing celerity, and each guest turned his dish bottom upward to show that all was gone. 
• There were two private nurses to wait on me, and they moved with the celerity of antelopes in response to my slightest bidding.