I take you mean when there is no planet/sign movement in any of the 12 houses?
If so it means that none of the planets/signs are having any strong affect on that particular day, so you can either choose to ignore what traits are missing as it doesn't hold much concern or you can choose to be aware of the missing traits and turn weakness into strength
There are 3 types of houses that contain the other 12 houses they are... Angular,Succedent,and Cadent.
The Angular houses correspond to the Cardinal signs which are the houses of 1,4,7 and 10
If there are no planets in angular houses it means that it's more difficult to initiate things,to stay in the here and now.
The Succedent houses correspond to the houses 2,5,8,and 11
When there are no planets in Succedent houses,the result houses,there may be no ability to focus on long term results or no concern with them.
The Cadent houses correspond to the houses of 3,6,9,and 12
When the Cadent houses are empty,there may be no sense of your background,of what has gone on before,and that could mean you can find yourself always starting over again from square one. Or you could be unconcerned with background matters and simply take them for granted.
I hope this may have helped you a little.
Love and Light