Hello Ed, here is my suggestion for the help text:

The „Rhythmenlehre“ goes back to the german astrologer A. Frank Glahn (1865-1941).

He let the AC run clockwise through the horoscope in 100 years (maximum life span at that time). So 25 years per quadrant and 8 1/3 years per house. At the same time, he let ran the AC counterclockwise in 25 years per house. In 1928 he and his colleague Rudolf Engelhardt introduced the 7 year per house rhythm, which ran clockwise through the horoscope. He used the placidus-house system.

Professor Dr Schneider from Vienne published 1932 his system of the 6 year rhythm in a counterclockwise direction.

Further information in the textbook by Gertrud I. Hürlimann. Read here:

https://www.astro.com/astrologie/hue150103_g.htmThe Huber School also works counterclockwise whith 6 years, but with koch-houses. Planetdance has a special module under: Horoskope-Various-Huber.

1953 Wolfgang Doebereiner from Munich published his extensive system of "Münchner Rhythmenlehre" with 7 year rhythm in clockwise direction, with placidus-houses, for the main rhythm. He developed the “Weg der Aphrodite”, with a “Fügungs- und Phänomenenrhythmus”. The system includes other rhythms that run right and left through the houses. A special feature is the method of dividing the horoscope into 7 year periods and linking them to the solar horoscopes. The radix forms the 1st Septar (0-7 years) and the 1st Solar the 2nd Septar (7-14 years) etc. these Septars / Solars can then run in 7 months per house (7M x 12 = 7 years ). It is a kind of temporal magnifying glass function. Doebereiner uses the clockwise direction for odd rhythms and the counterclockwise direction for even rhythms.

Further information here:

https://www.doebereiner.com and here:

https://archaeus.art/2005/09/30/the-horoscope-in-the-light-of-the-seven-rhythm-example-the-kennedy-clan/Another system that uses the 7-year cycle (but counterclockwise) was developed in 1963 by Professor Boris Christoff from Uruguay and is called ProLuna. At Planetdance under: Horoskope-Various-Proluna.

More information here:

https://www.youtube.com/watch?v=RW9cW83_zEUThen there are the "Phyramiden-Rhythmen" from the AstroPolarity School in Berlin. Developed from the angular relationships of the cleops pyramid with 4.33 and 6.33 years per house in both directions with placidus-houses.

Further information here:

https://www.astropolarity.de/