According to Doctor Jeanne Segal the author of the article Coping with Grief and Loss , "There is no normal time table for grieving".
In other words, there is no predicted length of time that you will stop grieving. It all depends on personality, coping style, life experience, faith, and nature of the loss.
Th psychiatrist Dr. Elizabeth Kubler-Ross is known for her amazing work in discovering the five stages of bereavement.
These five stages are Denial , Anger , Bargaining , Depression , Acceptance
One you've been through all five stages, grief is something that can be easily dealt with, no matter how long it takes.
Victor Frankenstein didn't undergo the stages of bereavement and handled it incorrectly. HE caused emotional damage to himself and those around him. However, Justine Moritz coped with grief incorrectly after the death of William Frankenstein. Instead of being honest through all five stages of grief, Justine chose the path of being killed under a false accusation.
However, according to The Family Caregiver Alliance grief results not only when a someone dies , but when themselves or family member is diagnosed with a chronic illness that will likely to result in death.
Two examples of this type of bereavement are ambiguous loss and anticipatory grief.
Ambiguous loss is the grief family members feel when a loved one is suffering from an illness such as dementia where they are not themselves at all. Anticipatory grief is the feeling someone gets when they are expecting death for themselves or a loved one.