irregularity(an activity or a practice which is not according to the usual rules, or not normal. OALD. Irregularities in the operation of the perforator lead occasionally to shortened stamps or to stamps with broadened corners, which does not, ... Alexander Demidov)
irregularities in the operation(If you notice irregularities in the operation of your engine, use the help of our company, which is ready to service your car with a computer system. | Every effort should be made to test the brake equipment on vehicles before they are brought into use in order that irregularities in the operation of the equipment ... Alexander Demidov)
