The phrase "a certain level of familiarity" is correct and usable in written English.
It can be used when discussing the degree of knowledge or comfort someone has with a subject or situation.
Example: "To effectively collaborate on this project, we need to ensure that all team members have a certain level of familiarity with the software we will be using."
Alternatives: "a degree of familiarity" or "some level of acquaintance".
The film also assumes viewers have a certain level of familiarity with the Islamic State's takeover of northern Iraq and with who the Yazidis are.
The writing is accessible, though tends towards the lengthy, and is willing to demand a certain level of familiarity with figures and complexity from its audience – not surprising, perhaps, for a site with a formal focus on data journalism.
Further, this study induced a certain level of familiarity with driving through crossings with the technology, using two repetitive sessions.
Wouldn't it be nice to maintain a certain level of familiarity and control over your finances, when everything around you feels different?
Another issue that had to be dealt with was that the riders had to achieve a certain level of familiarity with the instrumented motorcycle.
There's shrinking time to deadline, there's reduced resources to cover complex issues such as climate change that require a certain level of investigation, a certain level of familiarity with the contours and the nuances of the topics". Jennifer Morgan is the Global Director of the climate change programme at the World Resources Institute.
To toilet and bathe the resident, you need a certain level of training and familiarity with that task.
The pioneering researchers and psychologists Robert M. Yerkes and John D. Dodson discovered that a certain level of comfort and familiarity allows us to reach peak performance.
Although there is still a certain level of small-town familiarity among residents, he said, it is tempered by an influx of newcomers, a freestanding Starbucks and an increase in both traffic and teardown construction — the same elements encountered in any Chicago suburb.
Besides, it necessitates a certain level of experience as well as familiarity of the forensic expert with the cranial samples in a population group that is being studied.
On the field, the familiarity fostered by weekly clashes in the Celtic League, currently masquerading as the Pro12, bred a certain level of contempt.
