The phrase "co ile lat konkurs chopinowski" in English translates to "how often is the Chopin competition held?" The International Fryderyk Chopin Piano Competition is held every five years. It began in 1927 and, except for interruptions such as during World War II, it has been organized on a regular five-year cycle since its revival in 1949. The competition is one of the oldest and most prestigious piano competitions, exclusively featuring the works of Chopin, and it takes place in Warsaw. Participation is typically open to pianists aged 16 to 30 years.

So, summarizing: The Chopin Piano Competition is held every five years.