ETYM Cf. French épisodique. Related to Episode.
1. Limited in duration to a single episode.
2. Occurring or appearing at usually irregular intervals; SYN. occasional.
3. Of writing or narration; divided into or composed of episodes.

ETYM Latin intermittens, -entis, p. pr. of intermittere: cf. French intermittent.
1. Stopping and starting at irregular intervals.
2. Stopping and starting at regular intervals.

ETYM Greek, scattered, from from sperein to sow seed, to scatter like seed: cf. French sporadique. Related to Spore.
Recurring in scattered and irregular or unpredictable instances.