Different languages can distinguish between singular (for one), dual (for two) and plural (more than one/two), some languages also use a specific form for ‘three and only three’ which is called ‘trial.’

When a noun or pronoun appears in trial form, it is interpreted as referring to precisely three of the objects or persons identified by the noun or pronoun.

No language has a trial number unless it has a dual.

Kunwinjku has a trial form in certain pronouns.