Hi,

How much duration of "un-employment" is allowed between two consecutive jobs? If anyone knows kindly answer. Actually I had 3 months break between my current job and the previous job. and planing to apply for the skill assessment from EA?

That won't be a problem with EA - they are ensuring you have the correct skills, and if you are having experience assessed, that it is skilled experience.

If you are invited to apply down the line, you will need to explain gaps in employment to DIBP but they are not worried about how long you were unemployed.