single instance
- occurrenceSomething that takes place
- one-timeOccurring only once
- uniqueOnly one exists
- singularOne in number
- loneExisting by itself
solitary · isolated · individual · case · example · specimen · particular · moment · event · anomaly · exception · outlier · standalone · discrete · unit · episode · happening · snapshot
quantity/multiplicity
single instanceplurality
Largest share among several
abundance · plethora · multitude · proliferation · series
pattern/regularity
single instancerepeated occurrence
Instance happening multiple times
routine · epidemic · chronic condition · ongoing series · trend