supputation
noun
sup·pu·ta·tion
ˌsəpyəˈtāshən
plural -s
archaic
: the act or process or an instance of calculating : computation, reckoning
Word History
Etymology
Middle English, from Latin supputation-, supputatio, from supputatus (past participle of supputare to count up, reckon, from sub- + putare to consider, think) + -ion-, -io -ion