Is it possible for emacs to autosave in the background?

I have a file that I'm working on which is 3.3mbs in size, using
org-mode, and whilst I'm writing it *everything*, literally everything,
stops and pauses, becoming unresponsive until its saved completely.
Hence my request.

Thanks
Sharon.
-- 
A taste of linux = http://www.sharons.org.uk
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Debian 9.0, fluxbox 1.3.5-2, emacs 25.1.1, org-mode 9.0.9