Age, Frequency of preventive deworming ; 2 weeks, First preventive deworming ; 2 – 8 weeks, Every two weeks ; 3 – 6 months, Every month ; > 6 months, Every quarter.
I think about 1-2 years to get engaged, 2-3 years to getting married is ideal. Less if you're older. Anything longer than 5 years in your twenties and 3 years.