Dynamic insertbreak function looks for special character instead of lenght

HI forum,

I have the following function in use at the moment that inserts a " ." every x character.

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Example 1: Current
text = .aaa.bbb.ccc.ddd.

With a "=insertbreak(text;9) the function return above as: .aaa.bbb. .ccc.ddd. -- Which is correct.

Example 2: Future
tet2 = .aaaa.bb.ccc.dddd.
So the future setup could vary in lenght of the text I want to divide.

Im searching for a solution that could give me something like "=function(text2;x)" with the following result: .aaaa.bb. .ccc.dddd.

How do i modify the function to do as intended?

Thank you in advance

Based on your examples ..

=SUBSTITUTE(A1,".",". .",3)