episodic

If you have an episodic interest in professional sports, you pay attention to sports from time to time, but you're not a regular fan. The adjective episodic is often used to mean "occasional" or "every once in a while."

If you have a bad cough that comes and goes, you could call it an "episodic condition." When used in this way, episodic suggests that the cough appears at irregular, or random, intervals. Episodic can also describe the way certain stories are told. An "episodic narrative" is a story that is told through a series of episodes, or segments. A soap opera on television, for instance, is an episodic program.

Definitions of episodic
1

adj of writing or narration; divided into or composed of episodes

“the book is episodic and the incidents don't always hang together”
Synonyms:
divided
separated into parts or pieces

adj occurring or appearing at usually irregular intervals

episodic in his affections”
Synonyms:
occasional
unpredictable
not capable of being foretold

adj limited in duration to a single episode

“an account concerned primarily with episodic events such as the succession of rulers”
Synonyms:
impermanent, temporary
not permanent; not lasting