Metre (poetry) of over some two-and-a-half millennia. Beginning with the earlier recorded forms: the Classic of Poetry tends toward couplets of four-character lines, grouped in rhymed quatrains; and, the Chuci follows this to some extent, but moves toward variations in line length. Han Dynasty poetry tended towards the variable line-length forms of the folk ballads and the Music Bureau yuefu. Jian'an poetry, Six Dynasties poetry, and Tang Dynasty poetry tend towards a poetic metre based on fixed-length lines of five, seven, (or, more rarely six) characters/verbal units tended to predominate, generally in couplet/quatrain-based forms, of various total verse lengths. The Song poetry
Verse (poetry) is too pedestrian or too incompetent to be classed as poetry. Blank verse is poetry written in regular, metrical, but unrhymed, lines, almost always composed of iambic pentameters. <poem> </poem> Free verse is usually defined as having no fixed meter and no end rhyme. Although free verse may include end rhyme, it commonly does not. <poem> </poem> Verse (poetry) In the countable sense, a verse is formally a single metrical line in a poetic composition. However, verse has come to represent any division or grouping of words in a poetic composition, with groupings traditionally having been referred to as stanzas.