"shockingly common" is a correct and usable phrase in written English.
You can use it to emphasize the frequency of a given occurrence. For example, "It is shockingly common for people in this country to live in poverty."
Double-counting and phantom athletes are shockingly common.
Statistics made it clear that texting while driving was shockingly common — and incredibly dangerous.
Although this form of slavery was banned in India in 1976, it remains a shockingly common practice.
It is shockingly common, seen in 12 to 23 percent of adolescents from 11 to 15 years old.
Toxics "are still shockingly common in our food and everyday objects", said Senator Jeff Merkley, a Democrat from Oregon.
The state prosecuted him using that single eyewitness's testimony (single eyewitness prosecutions are still shockingly common in New Orleans).
The fact that Mr. Wright's anti-white, anti-American and even anti-Semitic statements are rather shockingly more common among black than white Americans ever would have believed does not change the fact that it is hate speech and undeserving of anything but contempt.
Aghast, the Anglicans eventually wrestled them back, but until 1800 the Friends were pretty much the only organized religion around, with the exception of Moravian dissenters who shockingly practiced common ownership and profit-sharing.
Norbert was shockingly vulgar.
Ciaran Devane, chief executive at Macmillan Cancer Support, said: "Shockingly, the most common form of skin cancer, malignant melanoma, has shot up by 78% among men and 48% among women in the last 10 years.
On Wednesday, the co-executors of the Jackson estate wrote to Discovery to say the program was "in shockingly bad taste" and cited "common sense and decency" in urging the program be pulled from the air.
