The phrase "a frequent criticism" is correct and usable in written English.
It can be used when discussing common or recurring negative feedback or objections regarding a particular subject or issue.
Example: "One of the most frequent criticisms of the policy is that it disproportionately affects low-income families."
Alternatives: "a common critique" or "a regular complaint".
Yet a frequent criticism of the protesters has been the absence of specific policy demands.
"A frequent criticism of the Many Worlds approach is that it's just too baroque to be true," Mr. Greene writes.
One of Mercedes's regrets, and a frequent criticism in Germany, was that it did not have a German driver.
He pointed to a frequent criticism of the death penalty, that it is disproportionately applied to minority defendants.
Without grumping at all about any of those, a frequent criticism of capital spending decisions is that they can appear arbitrary and unplanned.
A frequent criticism of some widely adopted management theories is that they take insufficient account of the people who work in the firms that consultants analyze.
It is an all too frequent criticism of a monthly "circus" now drawing to an end of TUC, Lib Dem, Labour and Conservative conferences.
AT&T, too, has been a target of frequent criticism as many of us believe it may have also played a part in the decision.
The special road tax that the Peasants Party blocked would have allowed Poland to win matching money from the European Union for improving its woefully inadequate highway system, a point of frequent criticism by the union.
But for lawmakers, the attention surrounding last summer's trip — thanks to reports of a skinny-dipping Kansas lawmaker who was part of the delegation — has cast an unwanted spotlight once again on the practice of private groups paying for foreign travel, a source of frequent criticism in the past.
For example, if writing assignments, such as essays or even articles, are a source of frequent criticism, this may cause you anxiety.
