intermissive

1. Having temporary cessations; not continual; intermittent.
   • c. 1591–1592, William Shakespeare, “The Third Part of Henry the Sixt, […]”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: Printed by Isaac Iaggard, and Ed[ward] Blount, published 1623, OCLC 606515358 ↗, [Act I, scene i]:

     Wounds I will lend the French, instead of eyes,
     To weep their intermissive miseries.

   • I reduced Ireland, after so many intermissive wars, to a perfect passive obedience.

   • And therefore as though there were any feriation in nature or justitiums imaginable in professions, whose subject is natural, and under no intermissive, but constant way of mutation, this season is commonly termed the physician's vacation, and stands so received by most men.

• patchy, spasmodic; see also Thesaurus:discontinuous