b) the time scale associated with associated with the synchronization of the line - of - nodes with the the syzygies of the Earth — Moon — Sun system (i.e. the Lunar Synodic month) (wattsupwiththat.com)
a) the time scale associated with the synchronization of the line - of - apsides with the the syzygies of the Earth — Moon — Sun system (i.e. the Lunar Synodic month) (wattsupwiththat.com)
The period is determined by a Jupiter - Saturn - Uranus quadrature series, which returns in four steps of 69 yrs, and a single ~ 41.6 yr step to resolve at the regular synodic 3 body return of 317.67 yrs that Desmond King - Hele noted and studied. (wattsupwiththat.com)