18. The computer program product of claim 17 , wherein the operations further comprise: determining a distributional similarity score between the first query and the second query, the determination of the distributional similarity score between the first query and a second query being based on a comparison of first frequencies of terms that co-occur in text with terms of the first query and second frequencies of terms that co-occur in text with terms of the second query, wherein computing a similarity score for the first query and a second query comprises providing, as input to a trained model, the distributional similarity score between the first query and each second query and the temporal correlation score between the first query and the second query.
18. The computer program product of claim 17 , wherein the operations further comprise: determining a distributional similarity score between the first query and the second query, the determination of the distributional similarity score between the first query and a second query being based on a comparison of first frequencies of terms that co-occur in text with terms of the first query and second frequencies of terms that co-occur in text with terms of the second query, wherein computing a similarity score for the first query and a second query comprises providing, as input to a trained model, the distributional similarity score between the first query and each second query and the temporal correlation score between the first query and the second query. 19. The computer program product of claim 18 , wherein the operations further comprise: determining a query correlation score between the first query and the second query based on a comparison of a temporal series of occurrences of elements of the first query in a query log and a temporal series of occurrences of elements of the second query in the query log, wherein computing a similarity score for the first query and a second query comprises providing, as input to the trained model, the query correlation score between the first query and the second query, the distributional similarity score between the first query and the second query, and the temporal correlation score between the first query and the second query.