Once every year.
"Tour de" basically means "tour of". So tour de France = tour of France.
Le tour de France
Tour de France Tour de France
"Tour de France on TV" is "(le) Tour de France à la télévision" in French.
Bicycles are raced in the Tour de France
The first foreign stage of the Tour de France took place in 1903, during its inaugural edition. The race started in Paris and included a stage that crossed into Belgium. Since then, the Tour has frequently included stages outside of France, making it a truly international event.
bradley wiggins won the tour de france
Tour de France Féminin was created in 1984.
André Leducq, France, won the 1932 Tour de France
Rene Pottier won the 1906 Tour de France.
Albert Contador won the last Tour De France in 2009.
There is no entrance fee. The Tour de France is by invitation only.