Chronology - the science that deals with measuring time by regular divisions and that assigns to events their proper dates.

Clock - a device other than a watch for indicating or measuring time.

Calendar - a system for fixing the beginning, length, and divisions of the year and arranging days and longer divisions of time such as weeks and months in a definite order.

Schedule - a list of items to be dealt with; a list showing when something is supposed to occur.

Analysis - the separation of a whole into its component parts.

Artifact - an object showing human workmanship or modification.

Document - a writing that conveys information.

Past - having existed or taken place before the present.

Interpretation - an explanation of something that is presented in a manner that is understandable.

Historical account - a description or explanation of something that happened in the past.

Artifact - an object showing human workmanship or modification.

Document - a writing that conveys information