The phrase "regular mistake" is grammatically correct and can be used in written English.
It refers to a mistake that is commonly made or occurs frequently. You can use it when discussing a pattern of errors, either by an individual or in a group. Example: "Spelling errors are a regular mistake among elementary school students."
I have made regular mistakes on appointments.
During the lockout, the N.F.L. tried to convince its fans that the intense focus on the replacements was misplaced because the regulars make mistakes, too.
Specificity is always very close to 100%, which indicates that it is difficult to mistake regular traffic for attack traffic, and there are very few false positives.
During the lockout, when an effort was made to tamp down criticism of the replacement officials, it was often said that the regular officials make mistakes, too.
Ms. Perfect is trying to show that she can make the same kind of mistake that regular people make.
"This is a street fight and you don't fight a street fight with a regular army, the same mistake that the Americans made.
Rob Hendrickson, associate medical director at the Oregon Poison Center, said it's possible that incidents will increase after 2 June, as edibles can be easily mistaken for regular baked goods or candy.
For the most part, "Killing Them Softly" is fuzz-free, partly in line with Higgins's devout and Dickensian interest in those who break or bend the law, but also because the bad guys seem so keen to police themselves, and to correct one another's mistakes, that regular cops are superfluous.
And in a craft in which small errors are commonplace and bigger mistakes a regular occupational hazard, Ms. Toner devised a meticulous personal method for checking and re-checking names, dates, facts and figures in her own raw copy, a step few reporters take.
This is also where human rights organizations clash with military lawyers like Newton, since they argue that the regular occurrence of such mistakes amount to war crimes.
