When planets turn retrograde Mercury usually turns retro three times a year.     Venus retro periods occur every eighteen months or so Mars turns retro only once every two years. Mercury              Retrograde 24 days            Stationary approx. 3 days Venus                  Retrograde 42 days            Stationary approx. 11 days Mars                    Retrograde 80 days            Stationary approx. 20 days Jupiter                Retrograde 120 days          Stationary approx. 10 days        Saturn                Retrograde 140 days          Stationary approx. 10 days Uranus               Retrograde 150 days          Stationary approx. 16 days Neptune             Retrograde 160 days          Stationary approx. 16 days Pluto                    Retrograde 160 days          Stationary approx. 16 days