nothing like
now and again
I can't remember the last time
nonprolific
nonintermittent
sometimes
unprolific
nonrepetitional
nonincidental
noninevitable
unintermittent
unfretful
nonperennial
uninstantiated
not at all
common as pig tracks
nonregular
periodically
nontemporary
unattended
sporadically
unpredicable
untemporary
nonmomentary
unregular
nonhabitual
unprioritized
unmaidenly
oft
nonabnormal
unhinted
noncommonable
eternally
unsurmised
nonconsecutive
nonimmediate
noncoincidental
nonrandom
uncoincidental
uncommonable
nonrepeatable
occasionless
seldomly
nonapertured
unanticipative
unabrupt