They are called cicadas
It is called the Halley's comet
cells
those are called the Olympics
Cicada
It is called the cheese comet it is a really funny name for a comet it is called that because it lookes yello when u see it flieing past
Halley's comet appears after every 76 years.
There are no known periodic comets with periods near 10K years.
encke's comet that appears every 3.3 years
One happens every year, but it only appears in specific regions every 20-50 years.
A blue moon appears once every two or three years. It is an astronomical phenomenon where the moon actually colors blue. This is why it is called a 'blue moon'.
Once every ten years, in those years ending in zero. every 10 years
It is called El Nino