Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pŏpŭlātim, adv. [1. populus], from people to people, among all nations, everywhere, universally (ante-class.): poëta placuit populatim omnibus, Pompon. ap. Non. 150, 20; Caecil. ap. ib. 154, 14; Arn. 3, 5.