CĒCEXXIUHTICA every year, annually / cada año o de año a año (M) [(2)Cf.107r,(1)Rp.37]. Although all attestations are printed with a single x, the ones in C are in a section of examples formed with CĒCEM. The M assimilates to X by general rule to give the sequence XX. See CĒCEM, XIHU(I)-TL. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 27.