2 daysweek 1, 2, 3 & 4week 5, 6, 7, & 8weeks 9, 10, 11 & 12weeks 13,14,15 &16weeks 17, 18, 19, 20weeks 21, 22, 23, 24weeks 25, 26. 27. 28weeks 29, 30. 31. 32weeks 33, 34, 35, 36weeks 37, 38, 39, 40weeks 41, 42, 43, 44weeks 45, 46, 47, 48, 50 &51