nava—rātra m. a period of 9 days, [AitBr.]; [ŚrS.]
a Soma sacrifice with 9 Sutyā days, [KātyŚr.]; 9 days in the middle of the Gavām-ayana, [ŚāṅkhŚr.]
nava—rātra n. (also °trika) the 9 days from the 1st of the light half of month Āśvina to the 9th (devoted to the worship of Durgā), [RTL. 431]