each eleven, eleven by eleven, or every other eleven (see Molina)
Alonso de Molina:
matlatlactli ocecen. cada uno onze, o de onze en onze, o acada onze. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 53v. col. 1. Thanks to Joe Campbell for providing the transcription.