'Reckon' in the Bible

Then he [or his redeemer] shall calculate with his purchaser from the year when he sold himself to the purchaser to the Year of Jubilee, and the [original] price of his sale shall be adjusted according to the number of years. The time he was with his owner shall be considered as that of a hired man.

After he is cleansed [from the defilement of a corpse], seven days more shall elapse for him [before returning to the temple].