Iambic Heptameter, usually containing a cæsura after
the third or fourth foot. This is the basic line of most English-language songs. It is a natural phrasing for lyric poetry. Ballad measure, common measure,
hymnal stanza, and their relatives are really fourteeners presented as two shorter lines. This is why those structures alternate between iambic tetrameter and
iambic trimeter, and in the case of the common measure family, it only rhymes every other line. They are actually fourteener couplets presented as quatrains.
It can be accentual-syllabic or podic.