1) Date 2) Epoch 3) Horology 4) Horometry 5) Style 
Chronometry (from Greek χρόνος `time` and μέτρηση `measurement`) is the science of the measurement of time, or timekeeping. It should not to be confused with chronology, the science of locating events in time, which often relies upon it. ...
• (n.) The art of measuring time; the measuring of time by periods or divisions.
Measurement of intervals of time. ... Origin: chrono-+ G. Metron, measure ... Mental chronometry, study of the duration of mental and behavorial processes. ... (05 Mar 2000) ... 
The art of measuring time accurately.
Chro·nom'e·try noun [ Confer French chronométrie .] The art of measuring time; the measuring of time by periods or divisions. 
Type: Term Pronunciation: krō-nom′ĕ-trē Definitions: 1. Measurement of intervals of time.
chronometry The art or science of accurately measuring time; or the measurement of intervals of time.
the art of measuring time accurately. · measurement of time by periods or divisions.