nonuniform

capricious erratic intermittent jerky sporadic uneven unreliable

aberrant eccentric faltering shifting weaving

aimless casual changeable designless desultory disconnected discontinuous fitful fluctuating fragmentary haphazard hit-or-miss inconstant indiscriminate infrequent occasional out of order patchy purposeless recurrent shaky spasmodic uncertain unconsidered unmethodical unpunctual unsettled unsteady unsystematic up and down

constant continuous dependable regular reliable smooth steady

normal

common conventional even flat level methodical standard systematic usual