Retrograde periods for Mercury, Venus, Mars, Jupiter and Saturn. Rahu and Ketu are always retrograde by convention.
3 retrograde periods in 1940
23 days in कुम्भ
24 days in कर्कट
20 days in तुला
1 retrograde period in 1940
43 days in मिथुन
1 retrograde period in 1940
135 days in मेष
1 retrograde period in 1940
118 days in मेष
Rahu and Ketu are the lunar nodes and are always Vakri (retrograde). They move backwards through the zodiac at roughly 1.5° per month and change Rashi only once every ~18 months.
