The phrase "are commonplace in a" is correct and usable in written English.
It can be used to describe something that is frequently found or occurs in a particular context or environment.
Example: "These types of errors are commonplace in a fast-paced work environment where attention to detail may be compromised."
Alternatives: "are common in a" or "are prevalent in a".
Reprisals, I learned, for speaking out are commonplace in a system where hitting targets is imperative.
Those are unnecessary distractions, yet these sorts of arguments are commonplace in a community built on confrontation.
Ice ridges and cracks are commonplace in a region where knitted floes typically drift hundreds of yards an hour and constantly collide like tight-packed bumper cars.
Following the Guardian's revelation that distorted water tests are commonplace in a number of US cities, the head of the Ohio EPA called upon his national counterparts to overhaul the "woefully inadequate" lead and copper rule.
For mantids, effective defence is vital to improve their chances of survival – dangers are commonplace in a young mantid's world.
In particular, tasks that are commonplace in a mathematics course, such as 'solve 2x − 1 = 3x + 4' in algebra, do not often call for a negotiation of the task, since the word 'solve' and the existence of one variable both act as cues to conjure up what the student is supposed to do (Chazan and Lueke, 2009).
These sentiments were commonplace in a world where lives ended early and without warning.
Inflation was rampant and hunger was commonplace in a country rich in natural resources.
Smith's multi-cultural, poly-sport, international resume is commonplace in a cosmopolitan USA rugby squad.
Ms. Conrad said all of the attention on the visual performance of chips and investment in the accompanying technology meant that amazing graphics would be commonplace in a couple of years.
