Of about 1/4, 2/3 or 3/4, Earth's orbital period is 365 & this fraction of a day
[DOC] [TLE] Planetary Alignments - Space Math @ NASA [PAR] Suppose Mercury takes 1/4 earth-year and Venus takes 2/3 of an earth-year to ... 
Venus = 0, 2/3, 4/3, 6/3, 8/3, 10/3, 12/3, 14/3, 16/3, 18/3, 20/3,  ...