Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
quinquāgĭens, adv. [quinquageni], fifty times: dimicare, Plin. 7, 25, 25, § 92: centena milia, id. 6, 9, 10, § 27: perfricare, Cels. 2, 14.