Chiefly used in later texts; in older religious texts the synonym jꜣbt is usually used instead. As the two words share several written forms, the context of time period and linguistic register may sometimes be the only means to determine which reading is meant.
James P[eter] Allen (2010) Middle Egyptian: An Introduction to the Language and Culture of Hieroglyphs, 2nd edition, Cambridge: Cambridge University Press, →ISBN, page 455.