Every four years
both are/were held every 4 years, or as the ancient Greeks called it, every olympiad
the Olympics were originally held every four years when the Greeks created it , ( just as it is now )
every year
Every fourth summer.
The Ancient Greeks often traveled to get advice from the Oracle at Delphi. The actual oracle herself was known as the Pythia.
They do it every 4 years.
Each city had temples for the gods.
No, ancient Greeks did not have bathhouses. The Greeks did bathe however in large tubs that were often heated by coals.
Every four years at the Temple of Zeus at Olympia in Elis.
Every twelve years
Only at Olympia.
Every 4 years.