The most common scheme is abaab, but abbab, aabab, ababa and aabba are also permitted.
It is similar to the four-line redondilla but is distinct from the quintilla real, which contains five hendecasyllabic lines.
[1] Popular in the 15th century,[1] as a standalone poem the quintilla only evolved in the 16th century from the separation of the parts of the nine- or ten-line copla de arte menor.
The forms that begin with a couplet (aabba and aabab) were not popular on their own but do appear as the second half of the copla real.
481: Cualquier prisión y dolor que se sufra es justa cosa, pues se sufre por amor de la mayor y mejor del mundo y la más hermosa