The phrase "a relatively unexpected" is correct and usable in written English.
It can be used to describe something that is surprising or not anticipated to a certain degree, often in a comparative context.
Example: "The results of the experiment were a relatively unexpected outcome, given the initial hypotheses."
Alternatives: "somewhat surprising" or "fairly unforeseen".
It's a relatively unexpected news, and the board is now convening a committee to search for Kennedy's replacement.
The rapid expansion of short-term letting companies - as with drones and driverless cars - is a relatively unexpected phenomenon causing governments to rethink existing regulation.
Yale senior research scientist Adalgisa Caccone helped analyze the DNA of the specimen: "This was the first time I looked at the DNA of leftovers — very precious leftovers". In a relatively unexpected twist, the DNA results showed that this meat was neither mammoth nor giant sloth, but green sea turtle.
This was a relatively unexpected finding as the patient had maintained an alkaline urine and brisk urine output.
Harem pants are a fun, relatively unexpected way to dress up for breezy evenings -- find out how to wear them without looking like MC Hammer.
But in real life, Kelsey Grammer is an aficionado of something relatively unexpected: real estate.
Not just that, but we'll probably see one, two, or perhaps even all three teams who looked utterly doomed manage to get out of it, and a relatively big, unexpected scalp to suffer the drop.
With the Super Bowl just a few weeks away, the world of football has some relatively unexpected news.
While some American houses offer more prestige than pay -- Glimmerglass, the Opera Theater of St . Louisor the Virginia Opera, for example -- others are well financed, even in relatively unexpected places like Salt Lake City, New Orleans and Tulsa, Okla.
So, while it's easy to see that Uber is raising $1 billion for China as part of an aggressive plan to expand into a further 50 cities (it currently serves 12 in China), Didi Kuaidi's fundraising is relatively unexpected.
"This is relatively unexpected," Carpi said.
