Rome had it in 1960 only
Italy has competed in all Summer Olympics except 1904 and in all Winter Olympics. That would make 25 Summer Games (including 2008) and 20 Winter Games.
Bejing has held the summer Olympics once.
How many times has the summer olympics been held in London?
three times
2 in the summer Olympics and 2 in the winter Olympics
three times
Australia has been in every summer Olympics and some of the winter Olympics.
Once every 4 years, the next summer Olympics are London 2012
Summer and Winter combine, 32 times after the London Olympics are over.
London 3 times
2-3
Once in 1980.