infrequent

Not occurring regularly; occasional or rare.

Situated or placed at rather wide intervals, as in time or space.

Not frequent or customary; rare; uncommon; unaccustomed.

In zoology, being, as component parts, far removed from one another; distant; not numerous or close: as, infrequent spines, punctures, etc.

In botany, distant; sparsely placed: said of punctures, glands, hairs, etc.

Seldom happening or occurring; rare; uncommon; unusual.

Not frequent; not happening frequently.

not frequent; not occurring regularly or at short intervals