Among the Nandi an occupational definition of time evolved covering not only each hour but half hours of the day.

This reminds me of hearing attorneys journaling their day down to 7 1/2 minute increments for billing their clients.

But based on science and with computers, we're now able to discriminate things down to the time it takes atoms to vibrate and we can date and timestamp things in our worklives to the nth degree. Even this post will have a timestamp on it down to the thousandth of a second.