fiærþungsþing (OSw) fjórðungsþing (ON) noun

A þing ‘assembly’ of the judicial district fiarþunger (OSw)/fjórðungr (ON). In ONorw, appearing in the context of appealing a case from one type of þing to another. In OSw YVgL, appearing in the context of seeking compensation for fornication, alternatively at the hæraþsþing (q.v.) and prior to the landsþing (q.v.).

assembly of the fourth OSw YVgL Gb, Add
quarter thing assembly ONorw GuL Kpb, Olb Refs:

KLNM s.v. ting