I don't have the precise count, but Terry Bisson is known for his prolific output of short stories. You might need to check some comprehensive literary databases or his official bibliography for the exact number.
I'm not sure exactly, but Terry Bisson has written a considerable number of short stories throughout his career.
Terry Pratchett wrote a considerable number of novels. I think it's over 40.
Lovecraft wrote a significant number of short stories. Roughly speaking, it's believed to be approximately 70. His stories have had a lasting impact on the horror genre.
I'm not sure exactly, but Flaubert wrote a number of notable short stories throughout his career.
Fitzgerald wrote quite a few short stories, but it's hard to give an exact number off the top of my head.
Edgar Allan Poe wrote quite a few short stories, but the exact number is hard to pin down precisely. Maybe around 50 or so.
It's difficult to give an exact figure for the number of short stories Christie wrote. Her output was prolific, and new collections and reclassifications can sometimes change the count. But it's safe to say it was a substantial amount.
Agatha's output of short stories is substantial. Different sources might give varying counts, but it's safe to say it's a significant amount. You might want to refer to comprehensive bibliographies or dedicated studies on her work for an accurate figure.
It's hard to give an exact count. Saki was a prolific writer, and his collection of short stories is quite extensive. But it's likely in the dozens.
It's hard to give an exact number, but Fitzgerald wrote a considerable number of short stories during his career.