= seldom, adj.

Rare, infrequent. Now chiefly U.S.

Esp. of a thing or things not regarded as members of a class or type: occurring infrequently… Of something encountered haphazardly or at…

Occurring or celebrated once in an age, century, or very long period. secular games, secular plays, secular shows: in ancient Rome, games…

= infrequent, adj. 3.

That straggles. Occurring casually or occasionally, ‘stray’.

Not occurring often, happening rarely; recurring at wide intervals of time.

Not obvious.

Occurring at long intervals; infrequent. (Chiefly in predicative use, after Campbell's echo of Blair's phrase.)

Somewhat rare.

Not wont to appear; rarely seen.

Characterized by occasional or isolated occurrence, appearance, or manifestation.

That occurs relatively rarely. Also: characterized by a low rate of occurrence of something.