episodic vs occasional

episodic and occasional both are adjectives.

Word	Noun	Adjective	Verb	Adverb
episodic	No	Yes	No	No
occasional	No	Yes	No	No

As adjectives, episodic and occasional are synonyms defined as:

episodic and occasional: occurring or appearing at usually irregular intervals

episodic (adjective)	occasional (adjective)
of writing or narration; divided into or composed of episodes	occurring from time to time
limited in duration to a single episode	occurring on a temporary or irregular basis
occurring or appearing at usually irregular intervals	recurring or reappearing from time to time
	occurring or appearing at usually irregular intervals