SC 190 Agricultural Consultant VIC

Visa lodged on 27th Oct 2016 CO contact 9th Nov 2016 Medicals on 23rd Nov 2016 2nd CO contact 20th Jan 2017 asking form 1221 and 80 ,my CV and Wife,s IELTS. Uploaded all on same day. I want to know expert opinion how much time estimate I have to wait.
4 to 12 weeks from last CO contact