England has only won the 1966 world cup. There have been 19 world cups including the 2010 world cup. So it is safe to say that England has lost the world cup 18 times. But generally, nobody really "loses" the world cup.
Greece has never won a FIFA World Cup tournament. Their best performance was in 2010, but they did not advance past the Group Stage. Greece has qualified for a total of three FIFA World Cups in 1994, 2010, and 2014.