The Troth was created in 1987.
Amos Haines Troth has written: 'Genealogy of the Troth family of Burlington County, New Jersey, 1700-1800'
Troth - 2013 was released on: USA: 11 October 2013 (internet)
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Troth's primary duty was to serve as a bodyguard and protector, ensuring the safety and security of the individual or group they were assigned to. Troth was also responsible for defense and combat, acting as a deterrent to potential threats or attacks.
trough
ktm
Thereto I plight thee my troth.
troth
Oaths
I pledge my oath to you.
If "troth - peak - troth" is considered as one "cycle" then the number of cycles that occur (go past you) in a unit of time [usually minutes or seconds] is called the "frequency".