The expression “coffee break” was first attested in 1952 in glossy magazine advertisements by the Pan-American Coffee Bureau.
kilohertz, kHz, kilocycle per second, kilocycle, kc
(noun) one thousand periods per second
Source: WordNet® 3.1
12 June 2025
(noun) a decrease in the density of something; “a sound wave causes periodic rarefactions in its medium”
The expression “coffee break” was first attested in 1952 in glossy magazine advertisements by the Pan-American Coffee Bureau.