quinquennial; recurring every five years
decennial; recurring every ten years
quadrennial; recurring every four years; lasting four years
quinquennial; recurring every five years
decennial; recurring every ten years
quadrennial; recurring every four years; lasting four years
septennial; recurring every seven years
septennial; recurring every seven years
novennial; recurring every nine years
novennial; recurring every nine years
octennial; recurring every eight years
octennial; recurring every eight years