Noun
a quarter of an hour
Source: WordNetI think that we shouldn't be fixated all the time on the ups and downs of the weekly ratings, of the quarter-hour ratings. Walter Isaacson
Although the form, usually in quarter-hour episodes, proliferated widely in the mid- and late 1930s, they all had the same basic premise: that characters "fell into two categories: 1) those in trouble and 2) those who helped people in trouble. Source: Internet
Each hour consists of headlines on each quarter-hour, extended at the top of the hour to form the main part of the daily schedule though these are interspaced with other programmes, generally at weekends. Source: Internet
On clocks that display local time tied to UTC, the leap second may be inserted at the end of some other hour (or half-hour or quarter-hour), depending on the local time zone. Source: Internet
The network broadcasts news on a 24/7 format with updates on the quarter-hour. Source: Internet
Wells Cathedral clock is famous for its 24-hour astronomical dial and set of jousting knights that perform every quarter-hour. Source: Internet