'increasing appearance of' is a correct and usable phrase in written English.
You can use it to indicate that something appears more often than it did in the past. For example, "With the increasing appearance of online shopping, brick-and-mortar stores are struggling to keep up."
Their interest is marked by the increasing appearance of Afghan travelogues on blogs and travelers' forums like blogs.bootsnall.com and thorntree.lonelyplanet.com.lonelyplanet.com
DC's inclusion of Card seems to backpedal on the increasing appearance of gay characters and marriage into mainstream books.
The increasing appearance of Adidas, Disney and other brands (usually fake) indicates that access to goods smuggled from China is growing.
The increasing appearance of pets whose owners say they are needed for emotional support in restaurants — as well as on airplanes, in offices and even in health spas — goes back, according to those who train such animals, to a 2003 ruling by the Department of Transportation.
The second force has been the increasing appearance of Silicon Valley engineering offices in the Seattle metro area.
With the increasing appearance of oriented structures in many computer vision and image processing problems, for instance pulmonary vessels, trabecular bone, fingerprint, paintings, wood texture, etc.
The increased appearance of Asian models over the last decade, for example, is often described specifically in terms of appealing to luxury customers in China.
In follow-up examinations 7 to 13 years later, the researchers found that high blood pressure at the start of the study was associated with an increased appearance of white areas on the scan, a sign of brain deterioration.
As serum GH decreased in the hour after exercise, metabolic clearance rate may have increased leading to the increased appearance of GH in saliva and urine.
Computer vision systems can compensate for the lower angular resolution of the low-cost radar and the increased appearance of ghost radar targets (guard-rails, railings, lamp posts, reflections, etc).
