👉 Triennially refers to a period of time that is repeated every few years. It's like when you have an annual vacation, but it's also happening every year. Triennially means that it happens at regular intervals or in cycles.
👉 Trienniality is a term used in the context of astronomy and astrology to denote the occurrence of an event or cycle that occurs every 3 years. It refers to the period between two new moons, which are typically seen as the end of a lunar cycle and the beginning of a solar cycle. This means that each year has two full moons (the first and last) and one half moon, with the second half moon occurring in February or March.