Ok that may be a dub question but i couldnt figure it out.. How do you do EOD Injections ?

For example, if you inject in Tuesday, Thursday, Saturday, the next week you will have to inject Monday, Wednesday, Friday, and Sunday - which means 4 times in a week for the second, Lets say want to inject 750mg, the first week you inject 3 times x 250mg, but the second since you inject 4 times you will actually get 1g. So htf do you do it since the week is 7 days and you cant always get the same amount per week?