Alacrity

Our seamen have always been famous for a matchless alacrity and intrepidity in time of danger; this has saved many a British ship, when other seamen would have run below deck, and left the ship to the mercy of the waves, or, perhaps, of a more cruel enemy, a pirate.

Source: tatoeba (714823)

The alacrity with which she was greeted felt disconcerting, given the chilly reception she had experienced before.

Source: tatoeba (9032584)

I was shocked by the alacrity with which my typos and gaffes were pointed out.

Source: tatoeba (9496316)

Theirs was a nervous household. Jock and Hurry confined indoors for nearly two days had had too little exercise and too many good things to eat. They were quite cross and irrepressible. John had the fidgets. He couldn't even stay in the same room for more than a minute, and he wouldn't even try sitting down for a change. Lucy had had to give up at least a dozen things that required dry weather and sunshine. She seemed to take the rain as something directed particularly against herself by malicious persons. Evelyn, also cross and nervous, was on the point of retiring to her own room to write letters. Just then Dawson Cooper telephoned to know if she cared to take a little walk in the rain and she accepted with alacrity.

Source: tatoeba (12174128)