In the modern era, Greece has defaulted a grand total of five times — which is only half as many times as the default leaders, Venezuela and Ecuador, have.

Greece defaulted on its external-sovereign-debt obligations five times:

• 1826 — It happened during the Greek War of Independence from the Ottoman Empire.
• 1843 — Greece used funds from the Loan of 1832 on its military and "the upkeep of Otto, a Bavarian prince." The country stopped making payments in 1843.
• 1860 — After this default, Greece was kicked out of international markets until 1878.
• 1894 — When the markets opened, lenders were overeager, borrowing increased to unsustainable levels, and the government suspended payments in 1893.
• 1932 — This happened during the Great Depression.

Source: Investopedia