SOS!!I am facing some problem!       Hello everyone,I am new here.I am preparing for the IELTS so I have some problem and I am waiting for your help.
      Now,one of the problem is about the prase "in bits".According to the book CAMBRIDGE OBJECTIVE,there are two sentences I met. 
     1:Sometimes I would find that I had to start writing one section even if it was in the middle of the assignment,and then build up the whole thing slowly,<em>in bits</em>. 
     2:When I have got my first draft like this,I will go back and put<em> in bits </em>that improve the links between the different parts.
And I think the prase <em>in bits </em> has different meaning in two sentences and what's more I even heard of "<em>in bits</em>".Who can tell me about the meaning and how to use "in<em> bits</em>".




      And another question is what's the meaning of the phrases below:
the grand plan writer      
the patchwork writer 
the architect writer
the diver writer



    Thank you !