The following chart was adapted from: Ekwaru, John Paul, et al. “The importance of body weight for the dose response relationship of oral vitamin D supplementation and serum 25-hydroxyvitamin D in healthy volunteers.” PLoS One 9.11 (2014): e111265. PDF link

The blood levels are given in ng/ml and the dosing is in IU (international units) of vitamin D.

From the above graph, I would say that 100,000 IU of vitamin D once a week is ideal. Also, studies on correcting deficiency fail in a large percentage of cases at 50k/week. So 100k/week corrects vitamin D deficiency, and also maintains all persons in the ideal range of 50 to 70 ng/ml (125-175 nmol/l).

Use a loading dose of 50,000 IU per day for 7 days, then start 100k/week on day 14 or 15.