Origin: Germanic Old English suffix
Seldom has 3 different meanings across 1 category:
Rare; infrequent.
"We seldom see such clear skies in December."
Infrequently, rarely.
"She seldom visits her hometown after moving to the city."
From late Middle English seldom, alteration of earlier selden by analogy with adverbial datives such as whilom, from Old English seldan ("seldom"), from Proto-West Germanic seldanā, from Proto-Germanic seldanē. Cognate with Saterland Frisian säilden ("seldom"), West Frisian selden, komselden ("rare, seldom"), Dutch zelden, German selten, Danish sjælden, Norwegian Bokmål sjelden, Norwegian Nynorsk sjeldan, Swedish sällan, Faroese sjáldan, Icelandic sjaldan. More at seld and selly.