occasional

adj 0.748

unfrequented

adj 0.736

frequent

adj 0.718

rare

adj 0.713

few and far between

adj 0.699

uncommon

adj 0.675

intermittent

adj 0.668

sporadic

adj 0.664

frequentative

adj 0.629

aperiodic

adj 0.615

nonrecurring

adj 0.610

unusual

adj 0.597

periodic

adj 0.595

scarce

adj 0.590

irregular

adj 0.582

fitful

adj 0.581

unlikely

adj 0.581

frequentist

adj 0.577

nonperiodic

adj 0.571

noncontinuous

adj 0.568

nonregular

adj 0.566

intervalence

adj 0.565

unconstant

adj 0.553

improbable

adj 0.550

inconstant

adj 0.547

little-known

adj 0.542

finite

adj 0.542

one-off

adj 0.540

recurrent

adj 0.537

nonfinite

adj 0.532

exiguous

adj 0.530

sometime

adj 0.530

fleeting

adj 0.530

scanty

adj 0.529

sparse

adj 0.529

periodical

adj 0.528

rarefied

adj 0.524

discontinuous

adj 0.518

transient

adj 0.517

paucal

adj 0.517

unwonted

adj 0.515

unfamiliar

adj 0.514

discrete

adj 0.513

quasiperiodic

adj 0.512

untypical

adj 0.512

unaccustomed

adj 0.510

limited

adj 0.509

imprecise

adj 0.508

infinitesimal

adj 0.508

inconvenient

adj 0.507

recurring

adj 0.507

short-period

adj 0.507

occurrent

adj 0.507

off-and-on

adj 0.507

unscheduled

adj 0.506

unintermitted

adj 0.504

underused

adj 0.504

distant

adj 0.503

inexact

adj 0.503

infirm

adj 0.502

fractional

adj 0.501