"staggering development" is correct and usable in written English.
You can use it to describe something that is very impressive or remarkable. For example: "The staggering development of technology over the past decades has been remarkable to witness."
For the Expos to turn around now and acquire Colón is a staggering development.
"There has been staggering development on the North Shore in recent years," said Mayor Richard P. Goodwin of Brookville.
It's a staggering development — and one that Mr. Arnuk, 46, and Mr. Saluzzi, 45, say has contributed to the hair-raising flash crashes and computer hiccups that seem to roil the markets with alarming frequency.
Who's responsible for this staggering development in our political history?
"The pace of technology development is staggering," he said.
These staggering numbers require the development of meaningful interventions that will delay the onset, slow the progression or improve the symptoms of patients suffering from this progressive neurodegenerative disorder.
It ends two decades and a staggering number of plot developments later in the trenches of the Somme.
Following World War II, science fiction spread throughout the world from its epicentre in the United States, spurred on by ever more staggering scientific feats, from the development of nuclear energy and atomic bombs to the advent of space travel, human visits to the Moon, and the real possibility of cloning human life.
With VR and AR industries growing in staggering exponents, we also saw a special emphasis on gearing Unity to accommodate development for New Reality media.
Despite the endless list of clichés that historically have characterised the region, inequality is staggering and mainly responsible for curbing development.
These are staggering figures, and a rather recent development.
