The embassy visa officer will synthesize your previous Schengen visa records? After reviewing all the materials you submitted? If you feel that you really have practical needs and have the ability to go in and out of an area frequently? You will be granted multiple visas 1 year.
2. Sometimes some people apply for multiple visas 1 year without submitting letters or materials? But the visa officer thinks you meet the standard? I will also give you this visa.
Second, in general? If you want to get such a visa? It is recommended to provide the following materials:
1. Can I apply for a Schengen business visa at the same time? Attach your own application letter? And purchase the corresponding 1 year multiple-trip Schengen medical insurance or 1 year medical insurance.
2. Because you have obtained a German visa twice? Can I try to apply in Germany? If the invitation letter from the German inviter mentions that you need to be invited to Germany frequently for business activities? It will also help.
Why don't you try to apply again when you are ready? Good luck ~