10. The non-transitory computer-readable medium of claim 9 , wherein: determining the similarity measure comprises determining a divergence that measures the difference between the probabilities of the selection vector of the first search query and the probabilities of the selection vector of the second search query.
10. The non-transitory computer-readable medium of claim 9 , wherein: determining the similarity measure comprises determining a divergence that measures the difference between the probabilities of the selection vector of the first search query and the probabilities of the selection vector of the second search query. 11. The non-transitory computer-readable medium of claim 10 , wherein determining a divergence comprises: determining a first divergence of the probabilities of the selection vector for the first search query from the probabilities of the selection vector for the second search query; determining a second divergence of the probabilities of the selection vector for the second search query from the probabilities of the selection vector for the first search query; and averaging the first divergence and the second divergence to determine similarity measure.