Quatrain featuring alternating lines of iambic tetrameter and iambic trimeter and an a-b-a-b rhyming scheme. Many hymns are written in common measure. See Light Shining Out of Darkness by Cowper. See also ballad.
[n] the usual (iambic) meter of a ballad
[n] an integer that divides two (or more) other integers evenly
[n] a time signature indicating four beats to the bar