at what time or in what time adverb (see Molina)
canyuhyan?. aque tiempo, o enque tiempo aduerbio. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 12v. col. 1. Thanks to Joe Campbell for providing the transcription.