Title: Olympic Games
Content:  The modern Olympic Games or Olympics (Jeux olympiques) are leading international sporting events featuring summer and winter sports competitions in which thousands of athletes from around the world participate in a variety of competitions. The Olympic Games are considered the world's foremost sports competition with more than 200 nations participating. The Olympic Games are normally held every four years, alternating between the Summer and Winter Olympics every two years in the four-year period. Their creation was inspired by the ancient Olympic Games, held in Olympia, Greece from the 8th century BC to the 4th century AD. Baron Pierre de Coubertin founded the International Olympic Committee (IOC) 
Title: Olympiad
Content:  An ancient Olympiad was a period of four years grouped together, counting inclusively as the ancients did. Each ancient Olympic year overlapped onto two of our modern reckoning of BC or AD years, from midsummer to midsummer. Example: Olympiad 140, 1st year = 220/219 BC; 2nd year = 219/218 BC; 3rd year = 218/217 BC; 4th year = 217/216 BC. Therefore, the games would have been held in July/August of 220 BC and held the next time in July/August of 216 BC, after four olympic years had been completed.
Title: List of Olympic Games host cities
Content:  For individual summer and winter lists, see List of Summer Olympic Games and List of Winter Olympic Games. This is a list of host cities of the Olympic Games, both summer and winter, since the modern Olympics began in 1896. Since then, summer and winter games have usually celebrated a four-year period known as an Olympiad; summer and winter games normally held in staggered even years. There have been 29 Summer Olympic Games held in 23 cities, and 23 Winter Olympic Games held in 20 cities. In addition, three summer and two winter editions of the games were scheduled to take place but 
Title: Olympiad
Content:  An Olympiad started with the holding of the games, which occurred on the first or second full moon after the summer solstice, in what we call July or August. The games were therefore essentially a new years festival. In 776 BC this occurred on either July 23 or August 21. (After the introduction of the Metonic cycle about 432 BC, the start of the Olympic year was determined slightly differently).
Title: Summer Olympic Games
Content:  The Summer Olympic Games, also known as the Games of the Olympiad, are a major international multi-sport event normally held once every four years. The inaugural Games took place in 1896 in Athens, Greece, and most recently the postponed 2020 Summer Olympics were celebrated in 2021 in Tokyo, Japan. The International Olympic Committee (IOC) organises the Games and oversees the host city's preparations. In each Olympic event, gold medals are awarded for first place, silver medals are awarded for second place, and bronze medals are awarded for third place; this tradition began in 1904. The Winter Olympic Games were created out of the success of the Summer Olympics. It is regarded as the largest and most prestigious multi-sport international event in the world. The Olympics have increased in scope from a 42-event 
Title: Olympiad
Content:  the th Olympiad began roughly around 2 August, 2022. A modern Olympiad refers to a four-year period beginning January 1 of the year the Olympic Summer Games are normally held. Thus, the first modern Olympiad began January 1, 1896, the second January 1, 1900, and so on (the 32nd began January 1, 2020: see the Olympic Charter). Allowing for the absence of a year zero between the Olympiad of 4 BC and the one of 4 AD – since the Julian calendar goes directly from 1 BC to 1 AD – this means the ancient Olympic cycle is behind the modern Olympic cycle by one year.
Title: Olympic Games
Content:  countries. As of 2021, since the 1988 Summer Olympics in Seoul, South Korea, the Olympics have been held in Asia or Oceania four times, a sharp increase compared to the previous 92 years of modern Olympic history. The 2016 Games in Rio de Janeiro were the first Olympics for a South American country. No bids from countries in Africa have succeeded. The United States hosted four Summer Games, more than any other nation. The British capital London holds the distinction of hosting three Olympic Games, all Summer, more than any other city. Paris, which previously hosted in 1900 and 1924, is due to 
Title: Olympiad
Content:  1940 and 1944, but both were cancelled due to World War II. Nonetheless, the count of the Olympiads continued: The 1936 Games were those of the XI Olympiad, while the next Summer Games were those of 1948, which were the Games of the XIV Olympiad. The current Olympiad is the XXXII of the modern era, which began on 1 January 2020. Note, however, that the official numbering of the Winter Olympics does not count Olympiads, it counts only the Games themselves. For example, the first Winter Games, in 1924, were not designated as Winter Games of the VII Olympiad, but as the I Winter Olympic Games. 
Title: Olympiad
Content:  Some Olympic Committees often use the term quadrennium, which it claims refers to the same four-year period. However, it indicates these quadrennia in calendar years, starting with the first year after the Summer Olympics and ending with the year the next Olympics are held. This would suggest a more precise period of four years, but, for example, the 2001–2004 Quadrennium would then not be exactly the same period as the XXVII Olympiad, which was 2000–2003.
Title: Calendar era
Content:  Among the ancient Greek historians and scholars, a common method of indicating the passage of years was based on the Olympic Games, first held in 776 BC. The Olympic Games provided the various independent city-states with a mutually recognizable system of dates. Olympiad dating was not used in everyday life. This system was in use from the 3rd century BC. The modern Olympic Games (or Summer Olympic Games beginning 1896) do not continue the four year periods from ancient Greece: the 669th Olympiad would have begun in the summer of 1897, but the modern Olympics were first held in 1896.

Question: after how many years are the olympic games held?
Answer: Once every two years.