Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
rĕquĭētĭo, ōnis, f. [requiesco], rest (late Lat.): septimo requietionis anno, i. e. in the Sabbatical year, Jov. ap. Hier. in Jov. 2, 18: sabbatum enim requietionis est, Vulg. Lev. 16, 31; id. Act. 7, 49.