Meaning : Occurring from time to time.
Example :
Took an occasional glass of wine.
Meaning : Occurring or appearing at usually irregular intervals.
Example :
Episodic in his affections.
Occasional headaches.
Synonyms : episodic
Meaning : Occurring on a temporary or irregular basis.
Example :
Casual employment.
A casual correspondence with a former teacher.
An occasional worker.
Synonyms : casual
Meaning : Recurring or reappearing from time to time.
Example :
Periodic feelings of anxiety.
Synonyms : periodic