I need to set up Shock vibration analysis for electronic devices  based on following military  standards,

In this statement i am confused  with meaning of 3 shock/ direction  i.e. total 18 shocks and similarly 2 shock/ direction i.e total 12 shocks.

Can anyone tell me what does this number shock per direction mean..?? And how do we take these numbers of shocks into account Simulation set up?.

Thanks in advance.

Regards,

Shreeshial