n. 年代学者

Chronologist \Chro*nol"o*gist\, Chronologer \Chro*nol"o*ger\, n.
[Gr. ?.]
A person who investigates dates of events and transactions;
one skilled in chronology.

That learned noise and dust of the chronologist is
wholly to be avoided. --Locke.

THe most exact chronologers tell us that Christ was
born in October, and not in December. --John Knox.