Quarter-hourly

With the utmost precaution we crept upon the summit, and down the breast-work towards the onter edge of the rampart, when the sentinel made his quarter-hourly cry of “Sentinelle, prenez garde à vous,” similar to our “All's well"

For example, currently, smart meters can be configured to generate hourly, half-hourly, or quarter-hourly readings

We can furnish Bells, Tubes or Tongs, which can be attached to any Clock, arranged to strike quarter hourly the Westminster or Whittington Chimes

Only upon this quiet there broke quarter-hourly the chimes of the Church of the Sorbonne, completing, at the hour, a bar of music.

These projecting spikes passed an opening in the dial quarter hourly and at such times could be pushed in. If any spikes were left protruding in the morning the watchman had to give a satisfactory explanation.