I wanna make a little transacction of bitcoin and I wanna use a low fee (1sat/byte) as I don't wanna pay almost nothing on fees and I don't have a great hurry to have the transactoion completed and I can wait even some days. But before I wanna ask if someone could give me an approximation of more or less between what times will get confirmed almost for sure (not 100% but almost sure).

Thanks in advance.