not just a few years ago (see Molina)
amo quin quezquixiuitl. no ha pocos años. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 5v. col. 1. Thanks to Joe Campbell for providing the transcription.
Xihuitl, the word for year(s), is key here.