regularity

nouns

a property of polygons: the property of having equal sides and equal angles
is derived from
the quality of being characterized by a fixed principle or rate
"he was famous for the regularity of his habits"
is derived from
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antonym
is a type of (narrower)
an essential and distinguishing attribute of something or someone
"the quality of mercy is not strained"--Shakespeare
is an attribute of
in accordance with fixed order or procedure or principle
"his regular calls on his customers"; "regular meals"; "regular duties"
is an attribute of
contrary to rule or accepted order or general practice
"irregular hiring practices"