chronoscopyn.

/krəʊˈnɒskəpi/Etymology: < Greek χρόνος time + -σκοπία observation.
the world > time > reckoning of time > [noun]
1882 Aug. 433 The later chronoscopy has warranted the possibility of determining the educability of the nervous system to a punctual obedience.
This entry has not yet been fully updated (first published 1889; most recently modified version published online March 2018).