Friend beside a brain tumor. How much time not here?

My friend is hospice and I just found out she can't read for herself anymore and has a very short attention span.
I'm simply trying to get an idea of what to suspect. Is it possible based on what I know to estimate how much longer it will be?
Answers:
I'm so sorry first of adjectives. You can never really estimate that, unfortunatley (or fortunately depending on how you look at it). With a brain tumor she could go at any time. Just live each day as if it be the last time you'd talk to her.
It depends on the type of tumor and where it's located. I have a friend die within 6 months of finding out. I had brain cancer and I'm still here. So it depends. Find out what type of tumor and check out these sites.

www.abta.org
www.brainturst.org

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