Text Processing Question

[C.P. Ravikumar]

I was wondering if there is a utility to check
for repitition of words in a document.
For example, it should print those lines
where such sentences occur :

	the processor $i$  must send send its data to

(the word "send" is repeated twice).

I have the feeling this can be done using "awk".
I will appreciate if you can send your suggestion
to me directly, since  I don't read this newsgroup
on a regular basis.

If there are other such "syntax" checkers, I will
be interested! Who wouldn't be? :-)

Thanks!
-- 
Ravikumar