How many revolutions happened in france?

Depends what you call a Revolution. If it's a change of Constitution, there have been 23. If you mean a violent overthrow of the existing régime, then there were revolutions in 1789, 1792, 1795, 1799, 1805 (though the change from Consulate to Empire was bloodless), 1814, 1815, 1830, 1848 and 1870. I make that 9 or 10.