occasional

adjectives

occurring from time to time
"took an occasional glass of wine"
occasional
is similar to
not frequent; not occurring regularly or at short intervals
"infrequent outbursts of temper"
infrequent
occurring or appearing at usually irregular intervals
"episodic in his affections"; "occasional headaches"
episodic, occasional
occurring from time to time
"casual employment"; "a casual correspondence with a former teacher"; "an occasional worker"
casual, occasional
recurring or reappearing from time to time
"periodic feelings of anxiety"
occasional, periodic