quezquin.

Principal English Translation: 

how many are there?

Orthographic Variants: 
quezquintin
IPAspelling: 
keːskin
Alonso de Molina: 

quezquin? quantos o quantas son?
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 89v. col. 1. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

Quēzquin(tin) tlācâ tiquimitta? Ēyin(tin) = How many people do you (s.) see? Three.
Michel Launey, An Introduction to Classical Nahuatl, translated and adapted by Christopher MacKay (Cambridge: Cambridge University Press, 2011), 61.