2. The method of claim 1 wherein the determining of whether the query is time-dependent or time-independent includes analyzing the frequency of the query at the past intervals to determine a periodicity of the query.
2. The method of claim 1 wherein the determining of whether the query is time-dependent or time-independent includes analyzing the frequency of the query at the past intervals to determine a periodicity of the query. 5. The method of claim 2 wherein the periodicity of the query is determined using a cosine signal hidden periodicity model.