The phrase "are frequent users of" is correct and usable in written English.
It can be used to describe individuals or groups who regularly utilize a particular service, product, or resource.
Example: "The students are frequent users of the library, often spending hours there each week."
Alternatives: "regular users of" or "common users of".
Documentary producers also are frequent users of the materials.
The rough sleepers are frequent users of government services, including accident-and-emergency wards.
The tendency is by parents who themselves are frequent users of the Internet (they know what's out there) and who have middle-school-age children.
U.S. firms including Google, IBM and Microsoft are frequent users of the program, with Infosys topping the list of H-1B employers in 2017.
Similar to other youth, millennial engineers use technology extensively and are frequent users of both commonly used digital devices as well as applications.
Post company executives have long believed that the newspaper needed to build a larger core audience of people who are frequent users of the Web site and therefore the most likely to subscribe.
Since English is an acquired language for me, I am a very frequent user of English dictionaries -- and foreign language dictionaries, too, but more on that later.
(By the late 19th century, it is estimated that in some areas of China, as much as 80% of the population of villages were frequent users of opium, and the average is estimated at perhaps 10% of the entire population). This selection gives us a glimpse into what life was like for Ning Lao Tai Tai in North China in 1887-88.
After all, they're frequent users of its products and are apparently satisfied with what the brand already offers.
However, a survey in 2011 2012 showed that students in neither of the two countries were frequent users of ICT at school compared to many other European countries (European Schoolnet 2012a, b).
The majority were frequent users of multiple substances.
