back channeling

[nilsy]

i was wondering... how frequent should back channeling be used in a conversation?
hope you'll answer my question...im actually getting tired already of searching the net becuase they don't actually give me exact answers. thank you!!!
just send your answer here: sweet_sapphireangel0910@yahoo.com

 

[Anglika]

As much as seems necessary and not so much as to be an irritation to the other person.

I don't think there can be rules for this.