Duty (of a machine or apparatus)
duty cycle load cycle (deprecated)
1 - A sequence of operating conditions, to which a machine or apparatus is subjected.
2 - A statement or schedule of the loads on a machine or apparatus, including their
durations and sequence in time.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM