Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
septŭāgĭes, adv. [septuageni], seventy times, Col. 5, 2, 7.
Collat. form septŭāgēsĭes, Mart. Cap. 7, § 737 Kopp. (dub.); Ps.-Ascon. ap. Cic. Verr. 1, p. 152.