Principal English Translation:
four times
James Lockhart, Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 226.
Alonso de Molina:
nappa. quatro vezes.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 063r. col. 1. Thanks to Joe Campbell for providing the transcription.
Lockhart’s Nahuatl as Written:
particle. nāhui, -pa. 226
Attestations from sources in English:
In many texts, descriptions of rituals involve things happening in fours. For example, in a ceremony involving the ixiptla of Huitzilopochtli, called Yopoch, the "keeper of the god" would put four reeds in a gourd vessel with water, and four times (nappa) he would bathe the face of the representative of the deity. (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 3 -- The Origin of the Gods, Part IV, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1978), 7.
Attestations from sources in Spanish:
Av in aquin neҫiz aҫo governador aҫo alcaldeme aҫo regidorme yz ҫan ipampa anoҫo ipampa comunidad quincuilia in intlaxtlavil macevaltin ynic cecemilhuitl quimotlaqueviya castilantlaca anoҫo nican tlaca in tla vel neltiz ca aca quichiva y napa ixquich quixtlavaz = Y aquel que se descubra, gobernador, alcalde o regidor, que por sí o por causa de la comunidad quite a los macehuales el salario, por el cual cada día los castellanos ocupan a la gente de aquí, si se comprueba que alguien hace esto, lo pagará por cuadruplicado. (Cuauhtinchan, Puebla, s. XVI)
Luis Reyes García, "Ordenanzas para el gobierno de Cuauhtinchan, año de 1559," Estudios de Cultura Náhuatl 10 (1972), 296–297.